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The attack on Pearl Harbor was the factor that made the United States decide to enter the war.

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Q: What was a factor in the US entry into World War 2?
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Continue Learning about General History

What sparked the united states involvement in world war 1?

The sinking of the Lusitania was the spark for US entry into WW I.


Why the US entry World War 2?

The Japanese sneak attack on Pearl Harbor propelled the US into the war.


What are the reasons for the US entry into the World War 2?

One reaon was Pearl Harbor.


How did Native Americans react to the US' entry into World War II?

A few volunteered for military service.


What made US entry into World War 1 vital to the Allied cause?

Fresh manpower was needed to break the stalemate.