1. The Rapid German Advance

The German army unleashed its Blitzkrieg—a lightning-fast combination of tanks, infantry, and airpower—that shattered Allied lines with astonishing speed. Unlike the stagnant trench warfare of World War I, this new tactic allowed German forces to punch through defenses and encircle their enemies in mere days. British and French troops, caught off guard by the relentless assault, were driven relentlessly toward the Channel coast, their only hope of survival now pinned to Dunkirk.