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A complete answer would fill several volumes. The short answer is that Hitler had been successful in bluffing the Western Democracies into making concessions to his expansionist policies and did not think that they would declare war if he moved against Poland, especially if the USSR attacked from the opposite direction as part of their Non-Aggression Pact. Yet, that is what happened. When he invaded Poland, Britain and France declared war on Germany. On the other side of the globe, Japan who was already involved in a war with China, came under threat of embargo by Holland, England, and the United States when Japan decided make surprise attacks against them and knock them out in the first days of a wider war. Japan struck Pearl Harbor, the Philippines, Hong Kong, Singapore, and the Dutch East Indies in December of 1941, opening the Pacific Theater of WWII.

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11y ago
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13y ago

September 1, 1939, to September 2, 1945.

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Q: How did World War 2 happened?
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Related questions

What if World War 2 not happened?

the will be no world war 2


What happened to the nations who lost world war 2?

What happened to the nations who lost world war 2?


What war happened after World War 2?

The Korean War happened after WW2.


World wars in order they happened?

World War 1 happened first and World War 2 happened second.


What important events happened while Hitler was in power?

World War 2 and the Holocaust.


What happened to World War 2 guns after World War 2?

they were modifyed or put in muesuems


What happened most recently civil war World War 2 or revolutionary war?

World war 2 1900civil war 1800revolutionary war 1700so its world war 2


What happened before world war 2?

It was the Great Depression.


What happened after World War 1 was over?

World War 2 started.


What happened after World War 2 ended?

the Korean war


When did World war happen?

There were two world wars. World War 1, aka the Great War, happened from 1914 to 1918. World War 2 happened from 1939 to 1945.


Why should you never forget what happened during world war 2 and how what happened impacts human rights after world war 2?

cause it was an im[portyknjfdslng