Operation Ke, the Cost and the Memory

A Solomon Islander child at the Guadalcanal American Memorial on Skyline Ridge above Honiara during the commemoration of the campaign’s 80th anniversary in August 2022. The memorial, dedicated on 7 August 1992, overlooks the ground the Marines held in 1942. U.S. Marine Corps photo by Cpl. Dillon Buck; public domain, via Wikimedia Commons.

Guadalcanal · Chapter 9 of 9

Operation Ke, the Cost and the Memory

How the Japanese got their army off the island, what six months of fighting cost every nation involved, and what Guadalcanal holds today: wrecks, unexploded bombs, memorials and a capital city that grew out of a wartime base.

31 Dec 1942 – 9 Feb 1943, and sinceCape Esperance · Rennell Island · Iron Bottom Sound · Honiara~32 min read

By the last days of 1942 the men of the Japanese 17th Army on Guadalcanal were starving. Since November the Imperial Navy had kept them supplied mostly with drums of rice and ammunition pushed off the decks of fast destroyers at night, and many of those drums sank or washed up for the Americans to collect. The soldiers had a name for the island that has stuck to it ever since: Gatō, “Starvation Island.” In Tokyo on 31 December, Imperial General Headquarters accepted what its staff officers had been saying for weeks. The counteroffensive to retake the island was cancelled. The survivors would be brought out.

What followed was one of the most skillful withdrawals of the Pacific War. Behind a rear guard and a screen of air attacks that persuaded American commanders a fresh offensive was coming, Japanese destroyers ran down the Slot three times in the first week of February 1943 and carried away about 10,600 men. The Americans, watching twenty destroyers at a time race toward Cape Esperance, believed they were looking at another reinforcement. Not until the morning of 9 February, when two U.S. Army columns met at the village of Tenaro on the northwest coast and found nobody between them, did the campaign’s end become certain. That afternoon Major General Alexander M. Patch reported to Admiral William F. Halsey that the Tokyo Express no longer had a terminus on Guadalcanal.

This final chapter of the collection follows that withdrawal, including the costly cruiser action at Rennell Island that accompanied it, and then steps back to count the cost of the whole campaign. The figures are not tidy. Every count of the dead, of ships and of aircraft depends on who did the counting, what they included and when they counted, and this chapter gives the competing numbers and their sources rather than a single invented certainty. The last third of the chapter turns to what remains: the wrecks of Iron Bottom Sound, the unexploded ordnance that still kills people in Honiara, the memorials on Skyline Ridge and Mount Austen, the independent nation of Solomon Islands that grew up around the old American base, and the ties that bind the campaign to North Carolina.

The decision of 31 December

The Japanese decision to give up Guadalcanal was made by attrition before it was made in conference. The Naval Battle of Guadalcanal in mid-November had cost two battleships and most of a reinforcement convoy (Chapter 7), and the destroyer supply runs that followed bled the navy’s most valuable ships for a trickle of food. The Army’s own figures were grim. The U.S. Army official historian, John Miller Jr., using postwar interrogations, reports that Japanese officers described American air superiority as having immobilized their army on the island. A U.S. Navy historian, Dr. Heather M. Haley of the Naval History and Heritage Command, cites the Imperial General Staff officer Saburō Hayashi’s later account that the supplies reaching the island at times “amounted only to dozens of kilograms.”

On 31 December 1942 a conference of Imperial General Headquarters in Tokyo agreed to suspend operations to recapture Guadalcanal. Haley’s 2023 NHHC account notes that the headquarters had been told the island’s garrison still numbered about 20,000, an overstatement. Miller records the operational consequence: on 4 January 1943 General Hitoshi Imamura of the 8th Area Army at Rabaul and Vice Admiral Jinichi Kusaka of the 11th Air Fleet were ordered to evacuate the survivors and to hold new defensive positions in New Georgia, in the central Solomons (Miller, pp. 336–337). The plan was named Operation Ke. On Guadalcanal, Lieutenant General Harukichi Hyakutake, commanding the 17th Army, received the evacuation order on 15 January and directed his units to fall back west toward Cape Esperance, the island’s northwestern tip, fighting as they went.

It mattered that the decision was kept from the men who had to carry it out until the last moment. A withdrawal under fire is the most dangerous operation an army can attempt, and the 17th Army was not in a condition to fight its way anywhere. Units that had arrived in October as full regiments were down to a few hundred sick men. Haley quotes the historian Yoshida Yutaka’s description of Japanese forces on the island as “constantly under threat of starvation” once they lost control of the air. Whatever the planners in Rabaul intended, the men in the jungle west of the Matanikau were told only that they were moving to new positions.

Deception and the rear guard

Operation Ke rested on two things: a rear guard that could hold the Americans off long enough, and a deception that would make American commanders look the wrong way. The rear guard arrived first. On the night of 14 January 1943 a destroyer run landed a fresh force near Cape Esperance. Miller puts it at about 600 replacements and identifies it in his notes as the Yano (or “Yanno”) Battalion, after its commander, Major Keiji Yano; the Americal Division’s report called it a battalion of rear-guard specialists (Miller, p. 338 and n. 13). Later accounts based on Japanese records give a slightly larger figure of about 750 infantry with a mountain gun battery. Most of the men were reservists, older than the typical Japanese infantryman and new to combat. Haley names the overall rear guard after its commander, Colonel Norio Matsuda, as the Matsuda Unit.

The 17th Army began its withdrawal on the night of 22–23 January. That same morning the American XIV Corps, now commanded by Patch with the Americal Division, the 25th Infantry Division and the 2d Marine Division under it, opened its second January offensive. Miller describes how the 27th Infantry’s attack on 22 January met no resistance because the enemy had already withdrawn. Kokumbona, the village on the coast that had been the Japanese headquarters area for most of the campaign, fell on 23 January, with two American columns meeting inside it by 1510 (Miller, pp. 325–328). The Japanese, Miller notes, attempted none of the night attacks that had marked their earlier operations. They were walking away.

The deception was aimed at Halsey’s headquarters at Nouméa and at Patch. Japanese aircraft intensified their attacks on Henderson Field, in part, Miller writes, to make the Allies expect a landing (p. 337). Ships and aircraft were massed at Rabaul and at Buin on Bougainville, which was exactly what an offensive would look like. On 28 January six destroyers landed a party of 328 men in the Russell Islands, northwest of Guadalcanal, to serve as a waypoint for the evacuation. Allied intelligence read the buildup as preparation for a new Japanese offensive in the Solomons or New Guinea. By 7–8 February, Miller records, the Allies had deployed six naval task forces south of Guadalcanal to meet a Japanese fleet that was never coming (p. 335).

The deception worked partly because it fit everything the Americans had experienced. The Japanese had come back after the Tenaru, after Edson’s Ridge, after the October battles and after the November convoy. Each time the Tokyo Express had run in strength, it had been bringing men. Nobody on the American side had yet seen the Japanese army give up ground it had fought for, and there was no reason in late January 1943 to assume it would start on Guadalcanal. XIV Corps headquarters even pulled the 25th Division back toward the perimeter to meet what Miller calls “an apparent enemy threat to land once more on Guadalcanal” (pp. 334–335).

Rennell Island, 29–30 January

The last sea battle of the campaign was fought not in Iron Bottom Sound but about 100 miles to the south, and it was a Japanese victory. Halsey, expecting a Japanese offensive and needing to move troops into Guadalcanal, had several task forces at sea at the end of January. One of them, Task Force 18 under Rear Admiral Robert C. Giffen, was covering a group of transports. According to Samuel J. Cox, director of the Naval History and Heritage Command, Giffen’s force included the heavy cruisers Wichita, Chicago and Louisville, the new light cruisers Montpelier, Cleveland and Columbia, and six destroyers, with two escort carriers trailing behind.

Giffen had come from the Atlantic, where the threat to cruisers was submarines rather than aircraft, and he kept his ships in a formation suited to submarine defense. At dusk on 29 January, north of Rennell Island, twin-engine G4M “Betty” torpedo bombers of the 701st and 705th Air Groups found the force. In the gathering dark two torpedoes struck Chicago on her starboard side, leaving her dead in the water; a third hit Wichita and failed to explode. Louisville took the crippled Chicago in tow, and the fleet tug Navajo later relieved her. Chicago had survived Savo Island in August with her bow torn open (Chapter 2). She would not survive this.

On the afternoon of 30 January eleven more Bettys found the crippled cruiser and her tow. Cox writes that five torpedoes struck Chicago, four of which exploded, and that she went down at 1643 with 62 of her crew while 1,069 were rescued. A Betty that crashed after launching its torpedo hit the destroyer La Vallette, which survived; 21 of her sailors were killed. The Japanese lost nine bombers on 30 January and three the night before. Cox quotes Admiral Chester W. Nimitz’s judgment that the loss was “especially regrettable because it might have been prevented.” NHHC’s campaign summary calls Rennell Island the last tactical success for the Japanese in the eastern Solomons.

Rennell Island had an indirect effect on Operation Ke. The Japanese, who claimed far more damage than they had done, read the battle as confirmation that American naval forces were concentrated south of Guadalcanal and that the Slot itself would be open. The Americans, having lost a heavy cruiser to aircraft, were more cautious than ever about sending cruisers into waters within range of Rabaul’s bombers. Neither reading served the Americans well over the next nine days.

Three nights in February

Patch did not wait passively. On 31 January the reinforced 2d Battalion, 132d Infantry, under Colonel Alexander M. George, sailed from Kukum in six tank landing craft escorted by destroyers, rounded Cape Esperance and landed on 1 February at Verahue on the southwest coast, behind the Japanese. Miller records that Japanese bombers flew over the beach about noon without attacking, and that all troops and supplies were ashore by 1500 (pp. 343–344). The plan was to squeeze the Japanese between this force and the main American advance coming west along the north coast. On the north coast, the 147th Infantry had been detached on 29 January for the pursuit; it failed on 30–31 January to force a crossing of the Bonegi River against heavy fire from the Japanese rear guard, and only got across on 2 February (Miller, pp. 340–341).

The first evacuation run came the same day as the Verahue landing. That afternoon Japanese dive bombers caught the destroyer De Haven off Savo Island as she returned from escorting the landing craft. Cox writes that the bombs blew the ship in two and sank her almost immediately with 167 of her crew; 146 survived. After dark twenty Japanese destroyers under Rear Admiral Shintarō Hashimoto ran down the Slot. Eleven American PT boats from Tulagi went out to meet them, and the destroyers and their covering aircraft sank three, PT-37, PT-111 and PT-123, killing 15 men. The Japanese destroyer Makigumo was wrecked by a large explosion, probably from a mine, and was scuttled by another Japanese destroyer. Off Cape Esperance and Kamimbo Bay, landing craft shuttled troops out to the waiting destroyers. Most accounts based on Japanese records put the number taken off that night at 4,935.

The second run came on the night of 4–5 February, again with twenty destroyers. American aircraft attacked the force on the way down and badly damaged Maikaze with near misses, but the run went through and took off 3,921 men. The third and last run, on the night of 7–8 February with eighteen destroyers, took 1,972 men according to the Japanese count Cox uses, including the party from the Russell Islands; Isokaze was damaged by a near miss on the way. Miller’s text simply records that rescuing destroyers ran to Esperance three times, on the nights of 1–2, 4–5 and 7–8 February (p. 337). On 8 February coastwatchers warned of destroyers heading for Cape Esperance; the Verahue force, now marching up the west coast, saw none.

How many men the destroyers carried away is one of the campaign’s persistent arithmetic problems. The modern figure of 10,652, used by Cox and Haley at the Naval History and Heritage Command and by Richard B. Frank in his 1990 history Guadalcanal, comes from Japanese naval records. Haley’s own account, published in 2023, gives slightly different night-by-night figures, putting the final run at 1,796 and the first run on the night of 2–3 February, which shows how fragile even the official numbers are. Miller, writing in 1949, gave “about 13,000” on the basis of figures the Japanese provided after the war, while recording that the American estimates made at the time had ranged from 3,000 to 9,100. The Marine Corps historian John L. Zimmerman, also writing in 1949, accepted 9,100. Other published tallies, listed in the Wikipedia article on Operation Ke (used here only as a pointer), include 11,706 from Samuel Eliot Morison and 11,083 from Hayashi.

Reinforcing or evacuating? What the Americans saw

Nimitz’s report to Admiral Ernest J. King, as Cox summarizes it, conceded that the Americans did not realize the true nature of the operation until all organized Japanese forces had been withdrawn on 8 February, and credited the Japanese with deception and audacity. NHHC’s campaign summary puts it more bluntly: U.S. Army forces mistook the Japanese movements for offensive preparations and did not immediately pursue. Miller, writing for the Army, did not spare his own service. The western pursuit and the shore-to-shore envelopment at Verahue, he concluded, “were executed too slowly to achieve their purpose” (p. 348).

The case for the American commanders is that they were making decisions with incomplete information under a real threat. Halsey had lost two carriers, eight cruisers and more than a dozen destroyers defending Guadalcanal. Rennell Island had just shown that Japanese bombers could still sink heavy cruisers. Patch was responsible for an airfield complex that had nearly been overrun in October, and the signs of a Japanese buildup at Rabaul and Buin were real; the Japanese had built them up precisely to be seen. Miller notes that aerial photographs of Cape Esperance were not available on 7–8 February, so Patch could not confirm what the Japanese were doing there (p. 339). By the time he became convinced the Tokyo Express was running in reverse, there was nobody left to stop.

The judgment of later historians has generally been kinder to the Americans than Miller was. The 17th Army that left Guadalcanal was not an army in any useful sense. Many of the evacuees needed hospital care for months, and the units that reached Bougainville and Rabaul had to be rebuilt almost from nothing. The Americans had what they had come for: the airfield, the island and the initiative. What they did not get was the annihilation of a Japanese army in the field, which would have been the first of the war, and which would have to wait for later campaigns.

9 February: “no longer has terminus”

On 8 February the 161st Infantry drove a small Japanese party off the Tambalego River and reached Doma Cove. On the west coast, the 2d Battalion, 132d Infantry, had pushed north from Verahue past Marovovo. When its men reached the beaches around Kamimbo Bay they found abandoned Japanese landing craft and supplies, the debris of an army that had left in a hurry. Realizing what the boats meant, the battalion narrowed its front and pressed on. Between 1600 and 1700 on 9 February it marched into the village of Tenaro and met the 1st Battalion, 161st Infantry, coming the other way. Miller calls the meeting “an event that marked the end of organized fighting on Guadalcanal” (p. 347).

Patch reported to Halsey by radio. Miller quotes the message from the original, which he cites as a radio from the Commanding General, Cactus, to Commander South Pacific, filed at 0718 on 9 February 1943 and held in the USAFISPA G-3 worksheet file (p. 347 and n. 60). The quoted fragments below follow Miller’s text, including his ellipses; the full message is not reproduced in the published history.

“This kind of compliance” was a joke on Halsey’s orders, which had told Patch to destroy the Japanese on the island; the Japanese had not been destroyed, but they were gone. The phrase about the Tokyo Express has been quoted ever since, often in slightly different wordings. The version above is Miller’s, from the radio file. Note too the small puzzle of the clocks: the message gives 1625 for the end of the campaign, and Miller’s narrative places the meeting at Tenaro between 1600 and 1700 local time, while the message’s file time of 0718 was very probably a date-time group in Greenwich time, as naval messages commonly were. Guadalcanal local time was eleven hours ahead of Greenwich.

The wreck of I-1 was one of the last Japanese supply efforts of the campaign and one of its most consequential. On the night of 29 January the submarine, carrying supplies for the garrison, was caught by the New Zealand corvette-minesweepers Kiwi and Moa, which rammed and shelled her until she ran aground at Kamimbo. Documents salvaged from the wreck were later of value to Allied intelligence. The photograph of PT-59’s crew picking over her remains is a reminder that the New Zealanders were part of the naval war around Guadalcanal, too.

The toll: counting the dead

The most widely cited American figure comes from the Naval History and Heritage Command: “U.S. forces suffered 7,100 dead and nearly 8,000 wounded.” The National WWII Museum gives the same total of about 7,100 Allied dead. Those numbers are for all services and include the Navy at sea, and that is the first thing to understand about them. Guadalcanal is remembered as a Marine and Army land battle, but most of the Americans who died in it were sailors.

The ground figures are the best documented. Miller, using division reports, counts about 1,600 Army and Marine ground troops killed by enemy action and 4,245 wounded, out of about 60,000 committed: the 1st Marine Division, 774 killed and 1,962 wounded; the Americal Division, 334 and 850; the 2d Marine Division, 268 and 932; and the 25th Infantry Division, 216 and 439 (p. 349). The Army’s campaign brochure by Charles R. Anderson rounds this to 1,592 killed and 4,183 wounded, plus “thousands more” disabled for varying periods by disease. Zimmerman’s Marine Corps monograph, which also counts Marine aviation, gives 954 Marines killed in action, 103 died of wounds, 145 missing and presumed dead, and 3,070 wounded, a total of 4,272 casualties, of whom 359 were officers (Appendix A). Cox, using later Navy and Marine Corps data in 2022, gives 1,152 Marines and 446 soldiers killed ashore.

The Navy’s losses dwarf those figures. Cox writes in his 80th-anniversary H-Gram that just under 5,000 sailors were killed, a figure that includes about 130 naval aviators and aircrew, 49 Marines serving aboard ships and 92 Australian and New Zealand naval personnel. Savo Island alone killed 993 American and 84 Australian sailors; the night of 13 November, “Friday the 13th,” killed 1,439 American sailors. His summary sentence is stark.

“Almost three times as many American sailors died at sea defending Guadalcanal as Marines and Army personnel died on it.”

— Samuel J. Cox, Director, Naval History and Heritage Command, H-Gram 073 (August 2022)

Japanese losses are harder to count, because the Japanese army lost its own records along with its men, and because the totals depend on whether sailors and aircrew lost at sea are included. The ranges below are honest ranges, not a failure to choose.

Miller, working from Japanese postwar statements, says that of more than 36,000 Japanese soldiers and naval landing troops who fought on Guadalcanal, more than 14,800 were killed or missing, 9,000 died of disease and about 1,000 were captured (p. 349). Zimmerman, in the same year, took a Japanese figure of 37,680 men committed, subtracted 9,100 evacuated, and estimated land losses of 28,580, while warning that no accurate count existed. NHHC’s campaign summary gives “at least 19,200 dead.” Haley’s 2023 NHHC account cites 31,358 men of all services landed on Guadalcanal, of whom 20,706 died of starvation, disease or battle or were listed as missing. Cox adds that besides more than 20,000 lost on the island, about 10,000 more were lost at sea, about 3,800 of them navy sailors and many of the rest soldiers aboard sunken transports. The National WWII Museum’s summary gives about 31,000 Japanese dead in all.

What every count agrees on is that a large share of the Japanese dead on the island never died in combat. Miller’s 9,000 deaths from disease are more than a third of his total; Japanese veterans’ accounts and the postwar scholarship that Haley cites describe men dying of malnutrition, malaria, dysentery and beriberi in such numbers that the distinction between disease and starvation loses meaning. The Americans suffered heavily from malaria too. Anderson writes that for every man who became a combat casualty, five fell to malaria. But they were fed and evacuated, and very few died of it.

Australians, New Zealanders and Solomon Islanders

The Allied dead were not all American. The heaviest Australian loss was the heavy cruiser HMAS Canberra at Savo Island, where 84 Australian sailors died (Cox). Royal Australian Air Force Hudson crews flew reconnaissance over the Slot, and Australian coastwatchers, several of them former planters and colonial officers commissioned into the Royal Australian Navy, ran the radio network that warned Henderson Field of incoming raids (Coastwatchers of the Solomon Islands). New Zealand’s navy and air force were present from late 1942, as the I-1 episode shows; Cox’s naval figure includes 92 Australian and New Zealand naval personnel in all.

No one has an accurate count of the Solomon Islanders who died. In 1942 the islands had a population of about 100,000. The historian Clive Moore, in the Solomon Islands Historical Encyclopaedia, records that Solomon Islanders provided labor, helped the coastwatchers and scouted for the Americans; that about 600 to 800 men served in the British Solomon Islands Defence Force, including most of the prewar police; and that the Solomon Islands Labour Corps, proclaimed on 30 November 1942 with about 1,450 men, grew to about 3,700 by mid-1944. Prewar health services collapsed, villages near the fighting were abandoned, and Moore notes a significant decline in population throughout the islands. Sergeant Major Jacob Vouza, bayoneted by Japanese soldiers in August 1942 and still able to warn the Marines, became the best-known Islander of the campaign (Jacob Vouza and the Solomon Islands scouts). The war damaged homes, gardens and mission stations across Guadalcanal and Tulagi. In 1968, Moore records, the British government paid $953,282 to the Protectorate government to settle all war compensation claims; the money went to the government, not to the people whose property had been destroyed.

Ships and aircraft: two navies exhausted

Counts of ships lost vary even more than counts of men, because historians draw the boundaries differently. Does the count include the heavy cruiser Kako, sunk by an American submarine off New Ireland on her way home from Savo? The destroyer-transports and the small tugs and patrol craft? Submarines? The Army’s campaign brochure says simply, “Both navies lost twenty-four ships during the campaign.” The National WWII Museum gives 29 Allied and 38 Japanese ships lost, totals that include a wider range of vessels. Cox lists two American carriers, five American and one Australian heavy cruiser, two light cruisers, 15 destroyers, three destroyer-transports, one transport and numerous smaller vessels.

The chart below counts major warships by name, which is the most transparent method. On the Allied side: the carriers Wasp and Hornet; the heavy cruisers Astoria, Quincy, Vincennes, HMAS Canberra, Northampton and Chicago; the light cruisers Atlanta and Juneau; and the destroyers Jarvis, Blue, Duncan, Meredith, O’Brien, Porter, Barton, Cushing, Laffey, Monssen, Preston, Walke, Benham and De Haven. That is 24 ships, matching the Army’s figure; Cox’s count of 15 destroyers indicates that NHHC includes one more. On the Japanese side: the battleships Hiei and Kirishima; the light carrier Ryūjō; the heavy cruisers Kako, Furutaka and Kinugasa; the light cruiser Yura; and the destroyers Mutsuki, Asagiri, Fubuki, Murakumo, Natsugumo, Akatsuki, Yūdachi, Ayanami, Takanami, Teruzuki and Makigumo, eighteen surface warships, plus several submarines including I-1 and I-3, and well over a dozen transports and cargo ships.

The balance of ships lost looks even. The balance of what the losses meant was not. The United States commissioned new carriers, cruisers and destroyers through 1943 faster than it had lost them in 1942; Japan could not. The Japanese navy’s destroyer force, the backbone of its night-fighting doctrine and its only reliable way to supply island garrisons, had been worn down by months of high-speed runs, bombing and battle damage even beyond the ships actually sunk. Cox notes that Yamamoto expected Operation Ke itself to cost half the destroyers he committed.

In the air the comparison is starker still. The National WWII Museum gives 615 Allied and 683 Japanese aircraft lost; Cox gives about 615 American aircraft of all services, including 90 carrier-based, and about 400 of those Navy and Marine Corps. Other estimates of Japanese losses that count operational accidents and aircraft destroyed on the ground run higher, and the Army’s brochure says only that Japan lost “over six hundred aircraft and pilots.” The numbers of aircraft matter less than the numbers of trained aircrew. American fliers shot down over Guadalcanal were often rescued, by Solomon Islanders and coastwatchers among others; Japanese aircrew lost over the island or in the long flights from Rabaul were almost never recovered. Cox writes that by the end of 1942 the majority of Japan’s experienced Pearl Harbor veteran pilots had been lost, and that after Santa Cruz the Japanese carrier force would not give battle for nearly two years (Chapter 3; the Cactus Air Force).

Burying the dead

The Americans buried their dead on the island as they went. The 1st Marine Division’s cemetery near Lunga Point, begun in the first weeks of the campaign, grew into rows of crosses and markers made from whatever was at hand, from scrap wood to shell casings. The photographs below, taken by Marine and Navy photographers in late 1942 and early 1943, are among the most reproduced of the campaign. The cemetery’s registers, now held by the National Archives, list the men by name, unit and date.

None of those graves remain. After the war the American Graves Registration Service disinterred the temporary cemeteries across the Pacific. Families chose either to bring their dead home for burial in the United States or to leave them in permanent overseas cemeteries; for the South Pacific, that came to mean chiefly the Manila American Cemetery in the Philippines and the National Memorial Cemetery of the Pacific in Honolulu. Men whose bodies were never recovered, including most of the sailors lost in Iron Bottom Sound, are named on memorial walls. The five Sullivan brothers of the light cruiser Juneau, lost on 13 November 1942, are listed on the Tablets of the Missing at Manila (USS Juneau and the Sullivan brothers).

The Japanese dead were mostly never buried at all in the formal sense. Thousands died in the jungle west of the Matanikau and on the slopes of Mount Austen, and their remains lay where they fell for decades. Moore records that a Japanese memorial to the war dead was erected in Honiara in 1971 and that about 7,000 sets of remains were cremated that year.

Iron Bottom Sound and the island today

The sailors who fought in it named the water between Guadalcanal, Savo and Florida Islands Ironbottom Sound, and the name stuck. Pacific Wrecks counts 53 ships sunk there during the campaign, along with an uncounted number of aircraft; a reviewer of Robert Ballard’s book on the wrecks wrote of nearly fifty. The sound averages roughly 600 meters (about 1,970 feet) deep, which put almost all of the warship wrecks beyond the reach of divers and, until the 1990s, of anyone at all. The interactive below plots the main wrecks from the campaign’s battles; positions are approximate, and the card for each ship says whether and by whom it has been found.

The first systematic survey was Robert Ballard’s, in July and August 1992, the campaign’s 50th anniversary. Ballard, already famous for finding Titanic and Bismarck, used sonar and a remotely operated vehicle to locate and film many of the deep wrecks for the first time, among them USS Quincy at about 610 meters (2,000 feet) and HMAS Canberra, sitting upright with her guns trained to port. His book The Lost Ships of Guadalcanal (1993), illustrated with paintings of the wrecks as they lie, remains the standard popular account.

Later surveys filled in the map. In January 2015, Pacific Wrecks records, the research yacht Octopus, owned by Microsoft co-founder Paul Allen, sonar-mapped the sound and located 29 wrecks, six of them positively identified, including Vincennes, Astoria, Quincy, Northampton, Canberra and Atlanta. In early 2019 Allen’s research vessel Petrel confirmed the wreck of the battleship Hiei, lying upside down in about 3,000 feet (900 meters) of water northwest of Savo Island; a Japanese research group had probably located her by sonar the year before. Hiei was the first Japanese battleship sunk by American forces in the war (Chapter 7).

In July 2025 Ballard returned. A 22-day expedition aboard the Ocean Exploration Trust’s vessel Nautilus, with NOAA Ocean Exploration, the Naval History and Heritage Command, the University of New Hampshire and partners including the Solomon Islands government and the Solomon Islands National Museum, surveyed 13 wrecks: the cruisers Vincennes, Astoria, Quincy, Northampton and Canberra; the destroyers Laffey, De Haven, Preston and Walke; the Japanese destroyer Yūdachi; an unidentified landing barge; and two discoveries, the Japanese destroyer Teruzuki, sunk by PT boats on 12 December 1942, and the bow of the heavy cruiser USS New Orleans, blown off by a torpedo at Tassafaronga on 30 November 1942 while the rest of the ship survived. Japanese, Australian and Solomon Islands researchers took part.

“We controlled the air, but they ruled the night.”

— Robert Ballard, on the naval war in Iron Bottom Sound, quoted by National Geographic (October 2025)

The deep wrecks are war graves, and every recent survey has been run on that basis: filming without disturbing, and recording positions so that the sites can be protected. The navies whose ships lie there regard them as the resting places of their crews. Neither the United States nor Japan nor Australia has given up its claim to its sunken warships, and any disturbance of them raises legal as well as moral questions.

Diving the shallow wrecks

A few wrecks are within reach. The best known are the two Japanese transports run aground at Bonegi, west of Honiara, on 15 November 1942, at the end of the last great reinforcement convoy: Hirokawa Maru (“Bonegi I”), whose deepest parts lie at about 55 meters, and Kinugawa Maru (“Bonegi II”), at about 27 meters, both reachable from the beach (Pacific Wrecks). Pacific Wrecks lists other sites for experienced and technical divers, including the fleet tug USS Seminole at about 33 meters, the destroyer USS Aaron Ward (sunk in April 1943, after the campaign) at about 70 meters, and USS Atlanta at about 131 meters, which is far beyond recreational limits. Local operators in Honiara and Tulagi run dives; the sites are on or off customary land, and visitors should go with a licensed operator and with the landowners’ permission.

The war that stays in the ground

For the people of Guadalcanal the campaign did not end in February 1943. The fighting left the north coast of the island and much of the hinterland seeded with unexploded bombs, artillery shells, mortar rounds, grenades and ammunition dumps, and the city of Honiara has grown over exactly the ground where the most ordnance was fired and stored. Moore records that a large wartime bomb had to be detonated at Henderson airfield as late as 1968. Ordnance still turns up in gardens, building sites and the sea, and people still die from it.

In September 2020 two specialists working for the humanitarian organization Norwegian People’s Aid, Luke Atkinson and Trent Lee, were killed when ordnance exploded at their home and office in the Tasahe area of west Honiara, where they had been conducting a survey of explosive remnants of war. Stars and Stripes reported that the group had recorded about 500 items of unexploded ordnance found and reported on Guadalcanal that year alone. In May 2021 a wartime shell exploded at Lengakiki in Honiara, killing one person and critically injuring two (Pacific Island Times). Under Solomon Islands law, only the Royal Solomon Islands Police Force’s explosive ordnance disposal unit is authorized to render safe, move and dispose of unexploded ordnance.

Clearance has been a long international effort. According to the U.S. Department of State, as reported by Pacific Island Times in December 2022, the United States had provided more than $6.8 million for ordnance clearance in Solomon Islands since 2011; the U.S.-funded program had trained 13 police explosive ordnance disposal technicians, who had responded to more than 1,200 callouts and destroyed more than 29,746 items. From January 2023 the State Department funded the HALO Trust with $1 million to map World War II ordnance, update the national database, train the police unit and help the Ministry of Police set up a coordination office. Australia’s navy and other partners have run clearance operations in the Solomons as well. The rule for visitors is simple and absolute: never touch or move anything that looks like ordnance, and report it to the police.

Memorials, and the islands since 1943

The principal American monument is the Guadalcanal American Memorial on Skyline Drive, the ridge that rises behind Honiara and looks over the Matanikau River and the old battlefields. It was built jointly by the American Battle Monuments Commission and the Guadalcanal-Solomon Islands Memorial Commission and dedicated on 7 August 1992, the 50th anniversary of the landings. A central pylon, four feet square, rises 24 feet above its base; four walls radiate from it toward the major battle areas, inscribed with accounts of the fighting and lists of the American and Allied ships lost. The dedication on the pylon pays tribute to “the Americans and their allies who lost their lives during the Guadalcanal campaign.” Admission is free, and the memorial is open-air (ABMC).

The Japanese memorial most visitors see is on Mount Austen, the high ground south of the airfield where the Gifu strongpoint held out into January 1943 (Chapter 8). The large white monument there, the Solomon Peace Memorial Park, was built by Japanese veterans in 1981 to honor all who died in the campaign. Moore’s encyclopedia notes smaller American and Japanese memorials on Bloody Ridge, the scene of the battle of 12–14 September 1942 (Chapter 5), and a memorial to the Solomon Islands scouts and coastwatchers unveiled near the Honiara wharves in August 2011. A cenotaph opposite the old Government House, designed by the government architect H. S. Barnes and built in 1957, displays the flags of seven nations that fought the Japanese.

West of Honiara, about a kilometer off the West Guadalcanal Road and less than an hour’s drive from the city, is the Vilu War Museum, an open-air collection in the forest. The late Fred Kona gathered the relics from across Guadalcanal in the 1960s and 1970s, sometimes against the wishes of veterans who preferred the wreckage left where it fell. Pacific Wrecks lists its aircraft as including an F4F-4 Wildcat that force-landed in March 1943, an F4U Corsair, a P-38F Lightning recovered off Kukum in 1972, an SBD Dauntless displayed on oil drums, and sections of a G4M “Betty” bomber, along with four Japanese 150 mm guns and memorial plaques to the dead of several nations. A 2015 study by Matthew Dornan of the Australian National University’s Development Policy Centre described the museum’s struggles with theft, vandalism during the island’s ethnic “Tensions” of 1998–2003, and too few visitors.

From base to capital

The town of Honiara is itself a product of the campaign. The name, Moore’s encyclopedia explains, comes from a Ghari phrase, Naho-ni-ara, for the land west of Point Cruz, “facing the ara,” the place where the southeast winds meet the land. Before the war the capital of the British Solomon Islands Protectorate was Tulagi, across the sound; the Japanese bombing of May 1942 and the American landings in August wrecked it. The Americans built roads, wharves, depots and airfields along the Lunga plain, and the Seabees’ facilities, in Moore’s words, “eventually became the nucleus of Honiara.” The British moved their headquarters to Point Cruz in 1946, and the Western Pacific High Commission moved there from Suva in January 1953. Airline service began in 1952, at first to the old Fighter Two strip at Kukum and later to an upgraded Henderson Field, which became the country’s international airport, today Honiara International.

The town grew slowly at first, to about 2,500 people in the mid-1950s and 11,191 at the 1970 census, and then quickly; Moore’s introduction puts it at around 65,000 today. The war also changed politics. Many of the men who served in the Labour Corps came home with new ideas about wages, organization and their own worth, and the movement called Maasina Rule, which spread from Malaita between 1944 and 1952, sought to prevent the return of British authority on prewar terms. The British refused to let Islanders use the vast stocks of war materiel the Americans left behind, which deepened the alienation. Solomon Islands became independent on 7 July 1978, with Honiara as its capital.

Anniversaries, 1992 to 2025

Major anniversaries have become diplomatic occasions. For the 80th, in August 2022, the United States sent a delegation led by Deputy Secretary of State Wendy Sherman with Caroline Kennedy, then ambassador to Australia and daughter of John F. Kennedy, whose PT-109 had operated from Tulagi in 1943, along with the deputy commander of U.S. Indo-Pacific Command and the commander of Marine Corps Forces, Pacific. The U.S. Indo-Pacific Command announcement listed a ceremony on Skyline Ridge, a Solomon Islands-hosted memorial at Bloody Ridge, and further events organized by Solomon Islands and Japan, honoring “U.S. and Allied forces, the people of Solomon Islands, and the people of Japan.” The ABMC’s own 80th-anniversary ceremony at the memorial took place on 7 August 2022.

The anniversary also served a policy purpose. The United States had closed its embassy in Honiara in 1993; in 2022, amid growing competition with China for influence in the Pacific, it announced plans to reopen, and the new embassy opened in late January 2023. Secretary of State Antony Blinken said the opening “symbolizes a renewal of our relationship” (Al Jazeera). In August 2025, at the 83rd-anniversary ceremony, U.S. Ambassador Ann Marie Yastishock spoke at the memorial alongside a Marine officer from the rotational force at Darwin and the superintendent of the Manila American Cemetery, who reminded the audience that every branch of the American armed forces, including the Coast Guard, had fought at Guadalcanal (ABMC).

What Guadalcanal meant

Miller’s summary, written in 1949, put the campaign’s meaning in strategic terms: American forces, carrying out the first task set by the Joint Chiefs of Staff, had taken the first major step toward reducing Rabaul, gained a well-sited base for continuing the offensive, halted the Japanese advance toward the line of communications between the United States and Australia, and taken the initiative from Japan (p. 349). Anderson’s 2019 Army brochure says the Americans “had stopped reacting to Japanese thrusts and taken the initiative themselves.” The Naval History and Heritage Command goes further.

“Together with the Battle of Midway, the Allied victory on Guadalcanal was likely the turning point of the Pacific War.”

— Naval History and Heritage Command, “Japanese Withdrawal, February 1943”

Midway in June 1942 had stopped Japan’s advance in the central Pacific by sinking four carriers in a single day (the Battle of Midway). Guadalcanal did something different and in some ways more decisive. It drew Japan into a six-month contest of attrition at the end of its supply lines, against an enemy whose shipyards and training schools were just beginning to produce at full scale. Japan lost not only ships and aircraft but the experienced crews, pilots and destroyer captains it could not replace, and it lost them defending an island it had not planned to fight for. After February 1943 Japanese forces in the Solomons were on the defensive, and the American advance up the Solomons toward Rabaul, through New Georgia and Bougainville, began from Guadalcanal’s airfields and harbors.

The campaign also settled lessons that shaped the rest of the war. Anderson writes that it showed that defeating Japan would be costly for both sides and that cooperation between the services was essential. The Marines learned to hold an airfield against repeated assaults and the Army learned to fight a corps-sized offensive in jungle; the Navy learned, at terrible cost, how to fight at night with radar. Medical services learned how much malaria could cost an army. And the pattern of the campaign, an amphibious seizure followed by a long fight to keep an airfield, became a model for later operations, including those in which the Navajo Code Talkers first served.

North Carolina and Guadalcanal

For readers in North Carolina, the campaign is closer than it looks on a map. The battleship that carries the state’s name fought in it, and the Marine division that now makes its home at Camp Lejeune fought in it as well.

Researching a Guadalcanal veteran, and visiting

Service records. The starting point is the man’s Official Military Personnel File, held by the National Personnel Records Center in St. Louis. Because the records of anyone who left the service 62 or more years ago are archival, any member of the public can order a World War II file for a copying fee, currently $25 for files of five pages or fewer and $70 for larger files; next of kin may also request records through the online eVetRecs system or Standard Form 180 (National Archives, Request Military Service Records). Be aware of the 1973 fire at the records center, which destroyed an estimated 80 percent of the files of Army personnel discharged between November 1912 and January 1960, and many Air Force files; Navy and Marine Corps files were not among the series listed as lost (National Archives, The 1973 Fire). For a soldier whose file burned, unit records, morning reports and final pay vouchers can help reconstruct his service.

Marines and sailors. Marine Corps muster rolls, which list every Marine by unit month by month, have been digitized from the National Archives’ originals and are searchable through genealogy services, often free at public libraries and National Archives research rooms; they show exactly when a man joined and left a unit on Guadalcanal. Navy muster rolls and ship deck logs serve the same purpose for sailors. The official histories are free online: Miller for the Army (final chapter on HyperWar), Zimmerman for the Marines, with the casualty tables in his Appendix A, and the Navy’s H-Grams for the naval battles. For men who died, the American Battle Monuments Commission’s burial search covers those buried or memorialized in its cemeteries, including the Manila American Cemetery.

Visiting. Honiara is reached by air through Honiara International Airport, the old Henderson Field. The Guadalcanal American Memorial on Skyline Drive is free and open-air (GPS S9 26.554, E159 57.441; ABMC visitor page). Within a day’s driving lie Bloody Ridge and its memorials south of the airport, the Japanese memorial on Mount Austen, the mouth of the Ilu (the “Tenaru” of Marine accounts) and Alligator Creek to the east, the Matanikau and Point Cruz in the city itself, and to the west the Bonegi wrecks and the Vilu War Museum. Hire a local guide; much of the island is customary land, and permission matters. And never touch anything that might be ordnance.

Further reading. The books that best repay the time are Richard B. Frank, Guadalcanal: The Definitive Account of the Landmark Battle (1990), which uses Japanese records more fully than any earlier work; John Miller Jr.’s Army history (1949) and the Marine Corps’ Pearl Harbor to Guadalcanal by Hough, Ludwig and Shaw (1958); Samuel Eliot Morison, The Struggle for Guadalcanal (1949), volume V of his naval history; Henry I. Shaw Jr.’s short First Offensive: The Marine Campaign for Guadalcanal (1992); and Robert D. Ballard, The Lost Ships of Guadalcanal (1993). The collection’s 100-question FAQ answers the questions readers ask most often.

Six months after the first Marines waded ashore at Red Beach, the campaign ended not with a battle but with two columns of tired American infantry meeting in an empty village. The cost of getting there was about 7,100 American lives, tens of thousands of Japanese lives, an uncounted number of Solomon Islanders and dozens of ships on the bottom of the sound. What it bought was the end of Japan’s advance in the South Pacific and the start of the long road to Tokyo. The memorial on Skyline Ridge and the white monument on Mount Austen look at each other across the same valley now, and the children of Honiara grow up among the wrecks.