Fall Gelb

Fall Gelb. It was the German operational plan for the invasion of the Low Countries and France in May 1940, initiating the Battle of France on the Western Front (World War II). Conceived as a bold revision of earlier, more conservative strategies, its execution led to one of the most stunning military victories of the Second World War, culminating in the Armistice of 22 June 1940. The success of the operation fundamentally altered the strategic balance in Europe and established German hegemony on the continent for the next four years.

Background and planning

Following the conclusion of the Phoney War, German high command, the Oberkommando der Wehrmacht, sought a decisive offensive to defeat the Western Allies. Initial plans, reminiscent of the Schlieffen Plan used in the First World War, envisioned a primary thrust through Belgium and the Netherlands. This approach, however, was considered predictable by many, including Adolf Hitler, who demanded a more audacious concept. The Oberkommando des Heeres, led by generals like Franz Halder, developed several iterations, but these were criticized for lacking a decisive knockout blow. The strategic impasse was broken by the intervention of Erich von Manstein, then Chief of Staff to Gerd von Rundstedt of Army Group A, who advocated for a radical shift in the main axis of attack.

The Manstein Plan

The pivotal revision, later known as the Manstein Plan or *Sichelschnitt* (Sickle Cut), proposed a fundamental gamble. Instead of the main effort by Army Group B through northern Belgium, it called for a concentrated armored thrust through the densely wooded and lightly defended Ardennes region. This force, spearheaded by panzer divisions under commanders like Heinz Guderian and Erwin Rommel, would then race to the English Channel, severing the Allied armies in Belgium from those in mainland France. After initial resistance from the conservative army high command, the plan gained Hitler's enthusiastic support following a personal briefing by Manstein in February 1940. The concept leveraged German combined arms tactics, or Blitzkrieg, and relied on Allied assumptions that the Ardennes was impassable for large mechanized formations.

Order of battle and initial dispositions

For the execution of Fall Gelb, Germany deployed three army groups along the frontier. Army Group B, under Fedor von Bock, was positioned in the north with the mission of invading the Netherlands and central Belgium, drawing the Allied mobile reserves, including the British Expeditionary Force and the French First Army, forward. The decisive Army Group A, commanded by Rundstedt, was massed opposite the Ardennes, containing the bulk of the panzer divisions organized into Panzer Group Kleist. To the south, Army Group C under Wilhelm Ritter von Leeb faced the fortified Maginot Line, tasked with a holding action. Opposing them, the Allied forces, under overall French command of Maurice Gamelin, had deployed their strongest formations, the Allied forces and the French Army, into Belgium according to the pre-arranged Dyle Plan.

The invasion of the Low Countries and France

The offensive commenced at dawn on 10 May 1940 with widespread aerial attacks, including the bombing of Rotterdam and the use of Fallschirmjäger (paratroopers) in operations like the capture of Fort Eben-Emael. As Army Group B advanced rapidly, the Allies executed their planned move into Belgium. Simultaneously, the armored columns of Army Group A began their treacherous passage through the Ardennes, achieving near-total tactical surprise. By 14 May, Guderian's corps had crossed the Meuse at Sedan, breaching the French defensive line. The panzer divisions then turned northwest in a relentless drive, reaching the coast at Abbeville on 20 May, trapping the Allied northern armies in a large pocket around Dunkirk. The subsequent Battle of Dunkirk and Operation Dynamo allowed for the evacuation of British and French troops but left France defenseless. German forces then turned south in Fall Rot, culminating in the surrender of France.

Aftermath and historical significance

The success of Fall Gelb resulted in a catastrophic defeat for the Allies, leading to the occupation of France and the establishment of the Vichy regime. It demonstrated the devastating effectiveness of combined arms warfare and cemented the reputation of the Wehrmacht as seemingly invincible. The victory had profound strategic consequences, isolating the United Kingdom and encouraging Italy to enter the war, while also allowing Hitler to turn his ambitions eastward toward the Soviet Union, leading to Operation Barbarossa. The operation's legacy is studied as a classic example of operational-level maneuver, though its success also bred overconfidence within the German high command, contributing to later strategic overreach during the war.

Category:Battle of France Category:Military operations of World War II involving Germany Category:Military plans of World War II