Is this statement true or false? northerners refused to allow blacks to join the army at the start of the war because they believed they could not fight.

True.

While many Northerners did not like slavery, many still held the belief that were not exactly on the same level as Northern whites, and should be treated as such. This led to many African Americans who join the Union army to only work for officers, or stay as cooks, cleaning service, and later on, privates and lower class petty officers.

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the correct answer is history and tradition.

oil! is what i am assuming