What are some events that could possibly mark the start of WWII?

1939: Hitler invades Poland. Hitler's invasion of Poland on 1st September 1939 marked the beginning of WW2 in Europe.

1940 (1): Rationing. ...

1940 (2): Blitzkrieg. ...

1940 (3): Churchill Becomes Prime Minister. ...

1940 (4): Evacuation of Dunkirk. ...

1940 (5): Battle of Britain. ...

1941 (1): Operation Barbarossa. ...

1941 (2): The Blitz.

Explanation:

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.

1939: Hitler invades Poland. Hitler's invasion of Poland on 1st September 1939 marked the beginning of WW2 in Europe.

1940 (1): Rationing. ...

1940 (2): Blitzkrieg. ...

1940 (3): Churchill Becomes Prime Minister. ...

1940 (4): Evacuation of Dunkirk. ...

1940 (5): Battle of Britain. ...

1941 (1): Operation Barbarossa. ...

1941 (2): The Blitz.

the berlin blockade was an international crisis that arose from an attempt by the soviet union, in 1948–49, to force the western allied powers (the united states, the united kingdom, and france) to abandon their post-world war ii jurisdictions in west berlin. in march 1948 the allied powers decided to unite their different occupation zones of germany into a single economic unit. in protest, the soviet representative withdrew from the allied control council. coincident with the introduction of a new deutsche mark in west berlin (as throughout west germany), which the soviets regarded as a violation of agreements with the allies, the soviet occupation forces in eastern germany began a blockade of all rail, road, and water communications between berlin and the west. on june 24 the soviets announced that the four-power administration of berlin had ceased and that the allies no longer had any rights there.