After the war begins, what action did over 1 million African Americans take?

1 million African Americans would enlist in WW1

Explanation:

During the 1910s African Americans would still be under scrutiny, and lots believed that serving in the army and fighting for their country would be a step to end the hardships they faced which sadly wasn't the case because when they returned after service they still suffered racism and hardships as they did before enlistment.

nope do not sign me up.