Since southern blacks were not allowed to fight in the civil war, how were they able to contribute to the war effort?

Joining the army anyway.

Explanation:

Southern Blacks were not legally allowed to fight in the Civil War. However, many did not respect this rule and joined the fight anyway. African Americans had a particular interest in the Civil War, as the states of the Confederacy were slave states, and the states of the Union were free states. The outcome of the war could determine the status under which the slaves lived. Therefore, many of them contributed to the war effort.

australian plates collided into eurasian plates, and the himalayas formed. the andes mountain range the himalayas and the islands of japan form differently. the andes mountain range formed at the convergent boundary of an oceanic plate and continental plate.