World War II · Western Europe · 10 May–25 June 1940
France Falls.
Dunkirk Holds.
A breakthrough at Sedan, an army cut off at the Channel, and a rescue that kept men in the war. The whole campaign in nine illustrated chapters—with the French defenders, Allied crews and civilians inside the story.
Operation Dynamo begins
From Dover, Ramsay’s staff turns a threatened retreat into an organized evacuation. On the other side of the Channel, rear guards continue fighting for time.
British troops queue on the beach at Dunkirk awaiting evacuation, approximately 26–29 May 1940.
The collection
A defeat, a deliverance—and the war that continued
The men waiting at Dunkirk had not arrived there because their war was over. They had been driven into a shrinking pocket after a campaign that overturned Allied plans in days. To understand the rescue, start with the roads, rivers and command decisions that put the sea at their backs.
On 10 May 1940, Germany attacked the Low Countries and France. Allied armies moved forward into Belgium while the decisive German thrust passed through the Ardennes and across the Meuse. When German forces reached the Channel on 20 May, the northern armies were cut off. Holding a corridor open failed; holding a perimeter long enough to leave became the urgent task.
The rescue was extraordinary, and the defeat was real. Operation Dynamo brought 338,226 British and Allied personnel to safety between 26 May and 4 June. Men fought for that time at the canals and towns; sailors and merchant crews crossed under attack; the RAF fought above and beyond the beaches. France’s campaign continued for three more weeks.
Evacuation total: L. F. Ellis, British official history, chapter XVI; Royal Navy and English Heritage. The dates refer to different stages, not interchangeable endings.
Interactive atlas
Follow the breakthrough, then cross the Channel
Two linked views explain the geography at different scales. Select a dated phase or press Play, then choose a labeled location. The coast and movements are generalized; no precise front line or surveyed evacuation route is implied.
Nine chapters
Read the whole campaign, in order
1Before the Breakthrough: The Phoney War and the Plans for Belgium
The armies that would retreat to Dunkirk began the spring of 1940 expecting to stop Germany in Belgium. Their preparations were substantial. The danger lay in where they expected the decisive battle to be fought.
210 May 1940: The Low Countries Invaded
Germany attacked the Netherlands, Belgium and Luxembourg while the Allied armies moved forward to meet it. The violence in the north was real, even though the campaign's decisive thrust was developing farther south.
3Sedan to the Sea: The Breakthrough That Split the Allied Armies
The Meuse crossing of 13 May became a deep advance across northern France. When German forces reached the Channel on 20 May, the armies in Belgium found the route back to the main French front cut behind them.
4The Road to Dunkirk: Arras, Calais and the Halt Order
The road to the beaches ran through a failed counterattack, defended Channel ports and a German pause whose causes still resist a simple explanation.
5Operation Dynamo: Ramsay, the East Mole and the Little Ships
The evacuation depended on naval organization, a breakwater pressed into service as a pier, shallow-water craft and repeated voyages through danger.
6Holding the Perimeter: The French Rear Guards, the RAF and the Last Nights
Ships could evacuate the army only while soldiers held the approaches. The final days joined a multinational ground battle, air fighting and a withdrawal that left many defenders behind.
7After Dunkirk: The Fall of France and the Other Evacuations
Dynamo ended on 4 June. France fought on: along the Somme and Aisne, through the fall of Paris and the western ports, until the armistices brought the fighting to a halt on 25 June.
8The People in the Retreat: Civilians, Soldiers and Prisoners
Behind the arrows were families on the roads, soldiers who held a position long enough for others to leave, men taken prisoner and crews who kept returning across the Channel.
9Defeat and Deliverance: What Dunkirk Saved, and How We Remember It
Dynamo brought 338,226 Allied troops away from Dunkirk. That remarkable achievement preserved people, not victory in France—and its memory is strongest when the rescue and the defeat are told together.
?100 questions answered
A searchable companion covering the plans, battles, rescue, people and memory—with links back to the chapters.
Try it yourself
Command decisions under pressure
Choose with the information available at the time, then compare your reasoning with the historical constraints. These are explanatory exercises, not a simulation that assigns invented casualties to your choices.
The honest numbers
Who got away—and what the army left behind
A rescue total is not a casualty total. The figures below keep their dates, national scope and categories visible. Losses in the whole France and Flanders campaign should never be relabeled as deaths on Dunkirk’s beaches.
Counting the cost
Ellis gives 68,111 British Army casualties across the campaign, including killed, wounded, missing and prisoners, and separately records 599 deaths from injury and disease. That is a different scope from the men rescued by Dynamo, the French army’s losses, or those who died at sea. We do not collapse these into one misleading number.
People
The people behind the arrows
Dover
Bertram Ramsay
Vice Admiral Ramsay and his staff coordinated the evacuation from Dover. The rescue depended on organized sailings and loading as well as local initiative.
Read the story in chapter 5 →Dunkirk
William Tennant
The senior naval officer ashore helped turn the East Mole into an embarkation point for large ships. Shore control connected the queues to the fleet.
Read the story in chapter 5 →The BEF
Lord Gort
The BEF commander had to balance Allied counterattack plans against the growing danger that his army would be cut off from every usable port.
Read the story in chapter 4 →The final perimeter
Jean-Marie Abrial
The French naval commander worked with the land forces holding Dunkirk. French resistance and the last crossings continued after most British troops had gone.
Read the story in chapter 6 →The River Dyle
Richard Annand VC
Annand fought against a threatened crossing on 15–16 May and, despite wounds, helped bring out a wounded comrade. His citation restores a personal story to the retreat.
Read the story in chapter 8 →Canal de Bergues
Harold Ervine-Andrews VC
His action on 31 May–1 June helped hold a canal position while men withdrew. The citation records fighting, care of the wounded and a difficult escape.
Read the story in chapter 8 →Beyond the familiar photograph
Force K6
Indian Army service troops belonged to the BEF’s story. The National Army Museum documents Punjabi Muslim soldiers at Dunkirk; the retreat was not solely a white British experience.
Read the story in chapter 8 →Time bought on land
French rear guards
Elements of the 12th and 68th Infantry Divisions and other French troops held the approaches during the closing stages. Their fighting made more sailings possible.
Read the story in chapter 6 →Units and crews
A rescue with many kinds of service
Infantry, engineers, aircrews and people who knew ships all belonged to the same operation. These reading badges are modern illustrations, not reproductions of official insignia.
British Expeditionary Force
The field army withdrawn through northern France; its professional core survived with little of its heavy equipment.
Explore chapter 4 →French First Army and rear guards
Lille and the approaches to Dunkirk belong at the center of the story of resistance, sacrifice and capture.
Explore chapter 6 →Royal Navy
Destroyers, minesweepers and other naval craft carried troops, escorted transports and rescued people from sinking ships.
Explore chapter 5 →French Navy
French ships and crews worked beside British and other Allied vessels; the loss of Bourrasque makes their cost visible.
Explore chapter 5 →Merchant crews and small craft
Ferries, passenger vessels, fishing boats and smaller craft performed different jobs in the same rescue system.
Explore chapter 5 →Royal Air Force
Fighter sweeps and other operations contested the skies, often beyond the view of troops waiting on the beaches.
Explore chapter 6 →Royal Indian Army Service Corps
Force K6 supplied essential transport service and adds an often omitted imperial dimension to the campaign.
Explore chapter 8 →Engineers and beach parties
Movement control, roads, demolitions, improvised loading points and handling boats were essential work under attack.
Explore chapter 5 →Courage in the retreat
The ground beneath the larger story
Victoria Cross · The original citations
Two actions on the road to the beaches
Richard Annand, 2nd Durham Light Infantry: at the River Dyle on 15–16 May, he fought a threatened crossing and helped rescue a wounded comrade despite his own wounds. Read his citation.
Harold Marcus Ervine-Andrews, 1st East Lancashire Regiment: at the Canal de Bergues on 31 May–1 June, he held on as his flanks were threatened, helped bring out wounded men and led survivors through water to escape. Read his citation.
These are selected actions from the campaign, not an exhaustive roll of awards. Continue with chapter 8 →
Myth and record
What the familiar story leaves out
The familiar claim
The little ships rescued the army by themselves.
The record. Small craft were vital, especially between shallow beaches and larger vessels. Destroyers, ferries, transports, merchant crews and harbor loading carried the larger system. The famous photograph shows one part of it.
Read chapter 5 →The familiar claim
The RAF was absent.
The record. A soldier on the sand could see aircraft attacking and never see the fighter engagements farther inland or higher overhead. The air defense was real, costly and incomplete; it did not prevent every raid.
Read chapter 6 →The familiar claim
Hitler deliberately let the British escape.
The record. The armor halt of 24–26 May gave the Allies time. Its causes and consequences remain debated. That is different from evidence of an intentional gift or a settled peace gesture.
Read chapter 4 →The familiar claim
The French did not fight.
The record. French troops fought in the campaign, at Lille and on the final perimeter. French ships rescued troops, and French soldiers were both evacuees and among those left to surrender.
Read chapter 6 →The familiar claim
Dunkirk ended the campaign in France.
The record. Dynamo ended on 4 June. Germany attacked south again on 5 June; Paris was occupied on 14 June. Armistices were signed on 22 and 24 June, and the ceasefire began on 25 June.
Read chapter 7 →The familiar claim
338,226 is the number of British soldiers rescued.
The record. It is the standard total of British and Allied personnel evacuated in Operation Dynamo. It is not a British-only count, a death toll or a total for every evacuation from France.
Read chapter 9 →Archive photographs
Look closely at the campaign
Sixteen authentic historical photographs, with contemporary captions checked against their archive records. Open a photograph for the full frame and its source and license links. Some pictures show the wider campaign or its aftermath; each caption says when and where it was made.
Questions and answers
Start with the questions readers ask most
When did the Battle of France begin and end?
The German western offensive began on 10 May 1940 with attacks on the Netherlands, Belgium and Luxembourg, followed by the decisive drive into France. Dunkirk was one episode within that campaign. The Franco-German armistice was signed on 22 June, while the ceasefire took effect on 25 June after the separate agreement with Italy.
What was the Phoney War?
The phrase describes the period after Britain and France declared war on Germany in September 1939 but before the main German offensive in the west. It does not mean that nobody fought or died. Naval warfare, patrols, preparations and other operations continued, while the expected decisive land battle in western Europe had not yet begun.
Chapter 1: Before the Breakthrough: The Phoney War and the Plans for Belgium →
What happened on 10 May 1940?
Germany opened its western offensive against the Netherlands, Belgium and Luxembourg, and Allied forces began moving forward under their prepared plans. Airborne and ground operations helped unsettle the northern defenses. At the same time, the main armored concentration advanced through the Ardennes toward the Meuse, where the campaign's most consequential breakthrough would develop.
What was the purpose of the counterattack at Arras?
The British-led counterattack at Arras on 21 May struck the flank of the German advance and sought to disrupt its momentum. It caused a serious local alarm and demonstrated that German forces were vulnerable to counterattack. Its limited scale and coordination, however, prevented it from reopening a lasting connection between the separated Allied armies.
Chapter 4: The Road to Dunkirk: Arras, Calais and the Halt Order →
What was Operation Dynamo?
Operation Dynamo was the organized evacuation of Allied troops from Dunkirk and its surrounding beaches to Britain between 26 May and 4 June 1940. It combined naval command, merchant vessels, smaller craft, beach parties and a land perimeter. It rescued a large body of personnel while leaving behind much of their heavy equipment.
Chapter 5: Operation Dynamo: Ramsay, the East Mole and the Little Ships →
Who defended the Dunkirk perimeter?
British and French formations defended the approaches and successive positions around the evacuation area. Their task was to prevent German troops from overrunning the beaches and harbor while embarkation continued. The perimeter was neither static nor exclusively British, and the later stages depended heavily on French resistance as British formations were withdrawn.
Chapter 6: Holding the Perimeter: The French Rear Guards, the RAF and the Last Nights →
What happened to civilians during the campaign?
The invasion drove civilians onto roads already crowded with military traffic, exposing families to bombardment, separation and uncertainty. Towns and villages suffered destruction as armies moved and fought through them. Refugees were not a background detail: their displacement shaped the experience of the campaign and complicated transport, supply and movement for everyone involved.
Chapter 8: The People in the Retreat: Civilians, Soldiers and Prisoners →
What was Fall Rot?
Fall Rot was the German offensive against the remaining French position after the northern campaign. It opened in June and drove beyond the defensive lines south of the Dunkirk disaster. French formations continued resisting, but the loss of forces, equipment and territory in the earlier phase severely weakened their ability to rebuild a coherent defense.
Chapter 7: After Dunkirk: The Fall of France and the Other Evacuations →
Was Dunkirk a victory or a defeat?
It was a successful evacuation within a severe Allied military defeat. The rescue preserved personnel who would otherwise have faced capture, but it followed the collapse of the northern position and the loss of heavy equipment. Both parts are necessary: calling it simply a victory obscures the campaign, while calling it only a defeat misses the rescue.
Chapter 9: Defeat and Deliverance: What Dunkirk Saved, and How We Remember It →
Are the interactive map's front lines exact boundaries?
They should be read as explanatory approximations unless explicitly tied to a detailed, dated operational map. Fronts moved, reports lagged and unit positions changed within a day. A clean line helps explain the campaign's shape, but it cannot reproduce every local position, movement or area of uncertainty on the ground.
Chapter 9: Defeat and Deliverance: What Dunkirk Saved, and How We Remember It →
Test yourself
How well do you know the campaign?
Follow the record
Read onward, then return to the sources
Read the evidence
- L. F. Ellis, The War in France and Flanders 1939–1940 — chapter 01 (HyperWar transcription)
- L. F. Ellis, The War in France and Flanders 1939–1940 — chapter 13 (HyperWar transcription)
- L. F. Ellis, The War in France and Flanders 1939–1940 — chapter 14 (HyperWar transcription)
- L. F. Ellis, The War in France and Flanders 1939–1940 — chapter 15 (HyperWar transcription)
- L. F. Ellis, The War in France and Flanders 1939–1940 — chapter 16 (HyperWar transcription)
- L. F. Ellis, The War in France and Flanders 1939–1940 — chapter 23 (HyperWar transcription)
- Imperial War Museums — Dunkirk evacuation: key facts
- National Army Museum — Defeat in the West, 1940
- English Heritage — Operation Dynamo
- English Heritage — The Fall of France
- www.usmcu.edu — Trying Not to Lose It
- www.iwm.org.uk — battle of france
- www.annefrank.org — germany bombs rotterdam the netherlands surrenders
- French Ministry of the Armed Forces — campaign and memory records
- The National WWII Museum — The tank attack at Arras
- www.english-heritage.org.uk — dunkirk 1940 the making of the miracle
- Royal Navy — Dunkirk commemoration and the operational record
- French Ministry of the Armed Forces — campaign and memory records
- French Ministry of the Armed Forces — campaign and memory records
- Victoria Cross and George Cross Association — Ervine-Andrews and his citation
- National Army Museum — The Indian contingent at Dunkirk
- Victoria Cross and George Cross Association — Richard Annand and his citation
- Royal Anglian Regiment — the Le Paradis memorial and the murdered prisoners
Archive photographs carry their own source and rights links. The maps are explanatory schematics. Routes, city markers and unit locations are approximate; they are not a reconstruction of every front line.