Why did the Europeans need the Blacks from Africa?

They needed them for Slaves

Explanation:

They needed them for free labor, so they took blacks from Africa.

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women should get jobs in the war industries

explanation:

during the time of the war women usually stayed back and got jobs to support the war by making bullets and machinery used in the war.

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in 1897, pershing became a tactical officer at west point, and that's where he was given the nickname "black jack." pershing's first name is "john," for which "jack" is a nickname, and he was a white man who commanded black troops. hence "black jack".