Dunkirk evacuation

The Dunkirk evacuation, codenamed Operation Dynamo and also known as the Miracle of Dunkirk, or just Dunkirk, was the evacuation of more than 338,000 Allied soldiers during the Second World War from the beaches and harbour of Dunkirk, in the north of France, between 26 May and 4 June 1940. The operation began after large numbers of Belgian, British, and French troops were cut off and surrounded by German troops during the six-week Battle of France.

After Germany invaded Poland in September 1939, France and the British Empire declared war on Germany and imposed an economic blockade. The British Expeditionary Force (BEF) was sent to help defend France. After the Phoney War of October 1939 to April 1940, Germany invaded Belgium, the Netherlands, and France on 10 May 1940. Three panzer corps attacked through the Ardennes and drove northwest to the English Channel. By 21 May, German forces had trapped the BEF, the remains of the Belgian forces, and three French field armies along the northern coast of France. BEF commander General Viscount Gort immediately saw evacuation across the Channel as the best course of action, and began planning a withdrawal to Dunkirk, the closest good port.

Late on 23 May, the halt order was issued by Generaloberst Gerd von Rundstedt, commander of Army Group A. Adolf Hitler approved this order the next day, and had the German High Command send confirmation to the front. Attacking the trapped BEF, French, and Belgian armies was left to the Luftwaffe until the order was rescinded on 26 May. This gave Allied forces time to construct defensive works and pull back large numbers of troops to fight the Battle of Dunkirk. From 28 to 31 May, in the siege of Lille, the remaining 40,000 men of the French First Army fought a delaying action against seven German divisions, including three armoured divisions.

On the first day, only 7,669 Allied soldiers were evacuated, but by the end of the eighth day, 338,226 had been rescued by a hastily assembled fleet of over 800 vessels. Many troops were able to embark from the harbour's protective mole onto 39 British Royal Navy destroyers, four Royal Canadian Navy destroyers, at least three French Navy destroyers, and a variety of civilian merchant ships. Others had to wade out from the beaches, waiting for hours in shoulder-deep water. Some were ferried to the larger ships by what became known as the Little Ships of Dunkirk, a flotilla of hundreds of merchant marine boats, fishing boats, pleasure craft, yachts, and lifeboats called into service from Britain.

The BEF lost 68,000 soldiers during the French campaign and had to abandon nearly all of its tanks, vehicles, and equipment. In his "We shall fight on the beaches" speech on 4 June to the House of Commons, British Prime Minister Winston Churchill called the event "a colossal military disaster", saying "the whole root and core and brain of the British Army" had been stranded at Dunkirk and seemed about to perish or be captured. He hailed their rescue as a "miracle of deliverance". Churchill also reminded the country that "we must be very careful not to assign to this deliverance the attributes of a victory. Wars are not won by evacuations."

In September 1939, after Germany invaded Poland, the United Kingdom sent the British Expeditionary Force (BEF) to aid in the defence of France, landing at Cherbourg, Nantes, and Saint-Nazaire. By May 1940 the force consisted of ten divisions in three corps under the command of General John Vereker, 6th Viscount Gort. Working with the BEF were the Belgian Army and the French First, Seventh, and Ninth Armies.

During the 1930s, the French had constructed the Maginot Line, a series of fortifications along their border with Germany. This line had been designed to deter a German invasion across the Franco-German border and funnel an attack into Belgium, which could then be met by the best divisions of the French Army. Thus, any future war would take place outside of French territory, avoiding a repeat of the First World War. The area immediately to the north of the Maginot Line was covered by the heavily wooded Ardennes region, which French General Philippe Pétain declared to be "impenetrable" as long as "special provisions" were taken. He believed that any enemy force emerging from the forest would be vulnerable to a pincer attack and destroyed. The French commander-in-chief, Maurice Gamelin, also believed the area to be of a limited threat, noting that it "never favoured large operations". With this in mind, the area was left lightly defended.

The initial plan for the German invasion of France called for an encirclement attack through the Netherlands and Belgium, avoiding the Maginot Line. Erich von Manstein, then Chief of Staff of the German Army Group A, prepared the outline of a different plan and submitted it to the Oberkommando des Heeres (OKH; German High Command) via his superior, Generaloberst Gerd von Rundstedt. Manstein's plan suggested that panzer divisions should attack through the Ardennes, then establish bridgeheads on the Meuse River and rapidly drive to the English Channel. The Germans would thus cut off the Allied armies in Belgium. This part of the plan later became known as the Sichelschnitt ("sickle cut"). Adolf Hitler approved a modified version of Manstein's ideas, today known as the Manstein Plan, after meeting with him on 17 February.