Final answer:
The U.S. Army played a significant role in race relations with its evaluation and recommendation for integration, as well as the valor of African American troops.
Step-by-step explanation:
The U.S. Army played a significant role in race relations despite the segregation of army platoons. The Army's evaluation of racial segregation and the subsequent recommendation for gradual integration marked an important step forward. Additionally, the valor and skill of African American troops in battles, such as the 761st Tank Battalion in the Battle of the Bulge, helped challenge racial prejudices.