敦刻尔克大撤退发生在第二次世界大战中。1 94 0年 5月 ,德国绕过法军重兵设防的马奇诺防线 ,侵入法国境内 ,英法联军约 4 0个师在德军的三面挤压下被包围在敦刻尔克至比利时沿岸的一块三角地带里。英法联军趁着德军先头部队暂缓前进的机会 ,修筑了防御工事 ,加强了防御 ,开始 The Dunkirk Great Retreat occurred in the Second World War. In May 1994, Germany bypassed the Magnito line of defense of the French army and invaded the French territory. An approximately 40 divisions of the British and French forces were surrounded on the three sides of the German army and surrounded in Dunkirk to the Belgian coast. Triangle area. The British and French forces took advantage of the opportunity for the German troops to suspend their advancement, built fortifications, and strengthened their defenses.