Final answer:
The Freedmen's Bureau was a government agency that provided relief and assistance to former slaves and loyal refugees after the Civil War. It primarily served African Americans.
Step-by-step explanation:
The Freedmen's Bureau was a government agency created by Congress in March 1865 to provide relief and assistance to former slaves and loyal refugees after the Civil War. It aimed to distribute clothing, food, fuel, land, and education to help prepare freedmen for citizenship. The Bureau served the largest number of African Americans, as it was primarily focused on providing support to the newly freed slaves in the South.