Home HistoryThe Battle of France (1940)

The Battle of France (1940)

by alan.dotchin

Introduction

The Battle of France, also known as the Fall of France, was a critical military campaign in World War II that took place between May 10 and June 25, 1940. Within six weeks, Nazi Germany defeated France, Belgium, Luxembourg, and the Netherlands, drastically altering the balance of power in Europe. This unexpected and rapid German victory stunned the world and marked one of the most significant military collapses in modern history. The campaign introduced the effectiveness of Blitzkrieg tactics, highlighted the weaknesses of French military doctrine, and paved the way for the occupation of France and the rise of the Vichy regime.


Background and Context

After the invasion of Poland in September 1939 and the subsequent declarations of war by Britain and France, Europe entered a phase known as the “Phoney War” or Sitzkrieg. Despite being at war, there was little to no major fighting on the Western Front during the winter of 1939–1940. Both sides prepared for a larger confrontation, and the Allies attempted to strengthen their defenses.

France, remembering the horrors of World War I, focused on static defense. The Maginot Line, a vast system of fortifications along the German-French border, was the centerpiece of French military planning. However, it did not extend through the dense Ardennes Forest or along the border with Belgium, which France expected to be the main theater of combat.

The French military doctrine was defensive and outdated, expecting a slow, attritional war. In contrast, the German military had modernized and embraced the revolutionary tactics of Blitzkrieg—a fast, coordinated strategy involving tanks, mechanized infantry, and close air support.


German Strategy: The Manstein Plan

Initially, Hitler favored a plan similar to the Schlieffen Plan of World War I, involving a wide sweep through Belgium. However, a German staff officer, General Erich von Manstein, proposed a more daring alternative.

Known as the Sichelschnitt Plan (“sickle cut”), it involved:

  • A feint attack through Belgium to lure Allied forces north.
  • A main thrust through the Ardennes Forest, considered impassable to large armies.
  • Rapid advance of armored divisions (Panzer groups) toward the Meuse River, then cutting westward toward the English Channel, encircling the French and British forces.

Hitler approved this plan, and it was executed with astonishing speed and precision.


The Invasion Begins

On May 10, 1940, Germany launched its offensive:

  • The Netherlands and Belgium were attacked, prompting Allied forces (including the British Expeditionary Force or BEF) to move north in defense.
  • Simultaneously, the Luftwaffe launched air raids across Belgium and France.

While the Allies engaged German forces in Belgium, Army Group A, under General Gerd von Rundstedt, began the true offensive through the Ardennes, where the French had stationed weaker divisions. The German XIX Panzer Corps, led by General Heinz Guderian, broke through French defenses at Sedan on May 14, aided by massive aerial bombardments from the Luftwaffe.

By May 20, German armored divisions had reached the coast at Abbeville, cutting off the bulk of French and British forces in Belgium and northern France from the rest of the country. This encirclement created what became known as the “Sickle Cut”, effectively trapping over a million Allied troops.


The Dunkirk Evacuation

With Allied forces surrounded, the German army pressed forward. However, in a critical and still-debated decision, Hitler halted the advance of the Panzers near Dunkirk, possibly due to concerns about overextending, difficult terrain, or a desire to let the Luftwaffe finish the job. This halt order, issued on May 24, allowed the Allies time to organize an evacuation.

The result was Operation Dynamo, a massive naval evacuation effort from May 26 to June 4, during which over 338,000 British and French soldiers were rescued from the beaches of Dunkirk by a flotilla of naval and civilian vessels. Though much equipment was abandoned, the operation was a morale booster and allowed Britain to continue the war.

Despite the success at Dunkirk, the battle was far from over.


Fall of Paris and Armistice

After Dunkirk, Germany launched a second phase of the campaign, known as Case Red, on June 5, 1940. With Allied lines broken and no cohesive defense, German forces swept southward.

On June 10, Italy, under Benito Mussolini, declared war on France and Britain, sensing an easy opportunity for territorial gain.

On June 14, German troops entered Paris without significant resistance. The French government had already fled to Bordeaux, and political chaos ensued. On June 17, French Prime Minister Philippe Pétain, a World War I hero, called for an armistice.

The armistice was signed on June 22, 1940, in the same railway carriage at Compiègne where Germany had surrendered in 1918—a symbolic act of revenge for Hitler. It came into effect on June 25.

Under the terms:

  • France was divided into an occupied zone (northern and western France) and a nominally independent Vichy regime in the south.
  • The French army was demobilized.
  • French prisoners of war were taken to Germany.
  • The French fleet remained under French control but was later attacked by the British at Mers-el-Kébir to prevent it from falling into German hands.

Why France Fell So Quickly

Several key factors contributed to the rapid fall of France:

  1. Outdated Strategy: French military doctrine was defensive and failed to adapt to the speed and mobility of modern warfare.
  2. Poor Use of Reserves: French high command failed to react to the German breakthrough in the Ardennes effectively.
  3. Air Inferiority: The German Luftwaffe gained air superiority early in the campaign.
  4. Command and Communication Failures: French commanders were slow to respond, lacked initiative, and had poor coordination.
  5. Blitzkrieg Tactics: Germany’s innovative use of armored units and coordinated air-ground assaults proved devastating.

Consequences

1. Occupation of France

Germany controlled the northern and western parts of France. Paris fell, and Nazi rule brought repression, censorship, and persecution, particularly against Jews and resistance fighters.

2. Establishment of Vichy France

Marshal Pétain’s collaborationist regime governed southern France and colonies but was heavily influenced by Berlin. The Vichy government enacted its own anti-Semitic laws and cooperated with the Nazis.

3. British Isolation

With France defeated, Britain stood alone against Germany until 1941. The Battle of Britain followed soon after.

4. French Resistance

Though defeated, the French Resistance began to grow, conducting sabotage, intelligence operations, and aiding the Allies throughout the occupation.

5. Global Shift in Power

Germany now dominated Western Europe. Hitler believed Britain would sue for peace and began planning Operation Sea Lion, the invasion of Britain. At the same time, the Soviet Union began expanding its influence in Eastern Europe under the Molotov-Ribbentrop Pact.


Conclusion

The Battle of France was a turning point in the early stages of World War II. It demonstrated the power of modern, mechanized warfare and the weaknesses of traditional military thinking. France, despite being one of the largest and most heavily armed powers in Europe, collapsed in just six weeks—a shocking and demoralizing event that changed the trajectory of the war.

Yet, the fall of France was not the end of French resistance. From the ashes of defeat, the Free French Forces under Charles de Gaulle emerged, and resistance movements continued to challenge Nazi rule. The Battle of France stands as both a cautionary tale of unpreparedness and a testament to the enduring will to resist in the face of occupation and adversity.

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