African Americans faced several types of discrimination in the Union army, including:
- They were not allowed to serve as officers.
- They were not eligible to win high awards, such as the Congressional Medal of Honor.
- They were not paid the same as white soldiers until after the war ended.
- They were not allowed to serve in units with white soldiers.
All of the options listed are accurate representations of the discrimination faced by African Americans in the Union army during the Civil War.