How did African Americans serve in WWI?

More than 350,000 African Americans served in segregated units during World War I, mostly as support troops. Several units saw action alongside French soldiers fighting against the Germans, and 171 African Americans were awarded the French Legion of Honor.

Explanation:

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Blacks were able to serve in all branches of the Army except for the aviation units. The government made no provision for military training of black officers and soon created segregated training camps for that purpose. Disheartened, blacks protested against this discriminatory practice.

Explanation:

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four sitting presidents have been assassinated while in office but the first was abraham lincoln,