Why is there two start dates for ww2

The two dates most often mentioned as “the beginning of World War II” are July 7, 1937, when the “Marco Polo Bridge Incident” led to a prolonged war between Japan and China, and September 1, 1939, when Germany invaded Poland, which led Britain and France to declare war on Hitler’s Nazi state in retaliation.

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the reason is because of the red army and the allies

the war started at different times

the answer is selfishly. hope this !

a) the colonists began to see themselves as different from people in britain.