Phase II: The Six-Week War (1940)
The invasion of Poland in September 1939 proceeded as historically recorded. Britain and France declared war but offered no offensive support. The "Phoney War" lasted eight months.
The invasion of France (Case Yellow) began on May 10, 1940. Here lies the second critical divergence. General Guderian, defying cautious superiors, pushed his Panzers to the Channel coast without pause. The British Expeditionary Force (BEF), trapped against the sea, was not evacuate