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Germany and the Soviet Union sign the Nonaggression Pact, which secretly accepts Germany's plan to invade Poland.
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Germany invades Poland in a blitzkrieg, which is a "lightning war." England and France declare war on Germany. This is the official start of World War II.
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American sentiment heavily favored isolationism. The US declares neutrality.
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Warsaw, Poland, surrenders to German forces. Poland is partitioned by Germany and Russia.
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The Germans damage cruisers South-Hampton and Edinburgh and ther destroyer Mohawk.
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The Soviet Union invades Finland and occupy a part of Poland. They end up taking over Lithuania, Estonia, and Latvia.
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The Soviet Union is expelled from the League of Nations for its aggression against Finland.
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The 1940 Olympic Games, which were supposed to be held in Finland, are cancelled.
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The British drop the first bombs on German soil as the RAF hits the seaplane base at Hornum.
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Germany invades Belgium, Holland and Luxembourg. British Prime Minister Neville Chamberlain resigns. Winston Churchill replaces him.