Why did thousands of black Americans fight on both sides of the war?

Many African Americans, both enslaved and free, wanted to join with the Patriots. They believed that they would achieve freedom or expand their civil rights.

Explanation:

"a shortage of traditional labor created new opportunities in the workplace. a major cause of the internment of japanese americans during world war ii was. racial prejudice. in the early 1940's, the "destroyers-for-military-bases deal" with great britain and the lend-lease act were evidence that the united states."