Question: what are the key events of ww2?
Answer: 7 July 1937: Clash near the Marco Polo Bridge, close to Beijing. ... , 10 May 1940: Germans launch offensive in the West. ... , 12 August 1940: Battle of Britain begins. ... , 22 June 1941: Launching of Operation Barbarossa. ... , 7 December 1941: Attack on Pearl Harbor. ... , 4 June 1942: Battle of Midway.