Final answer:
African American soldiers served in segregated units during World War I and, despite discrimination, units like the Harlem Hellfighters exhibited valor in combat under French command.
Step-by-step explanation:
The African American military experience in World War I is captured by the statement that African American soldiers served in segregated units. Despite facing severe discrimination, African American troops, such as those from the 369th Infantry Regiment known as the "Harlem Hellfighters," served with distinction. They were assigned to French units and saw combat, challenging the prevailing norms of the time. Military service was seen by many in the African American community as an opportunity to demonstrate their loyalty and capability, with the hope that this would translate into greater rights and acceptance back home.