Significant Events of World War II By jabarker Period: Sep 1, 1939 to Oct 6, 1939 Invasion of Poland Period: Sep 1, 1939 to Apr 1, 1941 Blitzkerg Period: May 27, 1940 to Jun 4, 1940 Evacuation of Dunkirk Period: Jul 10, 1940 to Oct 31, 1940 Battle of Britain Period: Sep 7, 1940 to May 10, 1941 The Blitz Period: Apr 10, 1941 to Nov 27, 1941 Battle of Tobruk Period: Jun 22, 1941 to Jan 7, 1942 Operation Barbarossa Dec 7, 1941 Pearl Harbour Feb 15, 1942 Fall of Singapore Period: Jun 4, 1942 to Jun 7, 1942 Battle of Midway Period: Aug 23, 1942 to Feb 2, 1943 Battle of Stalingrad Jun 6, 1944 D Day Landing Aug 6, 1945 Dropping of the Atomic Bombs