Final answer:
President Roosevelt's Executive Order 8802 during World War II improved the treatment of black soldiers by prohibiting racial discrimination and ensuring equal employment opportunities in defense industries, including the military.
Step-by-step explanation:
President Roosevelt's Executive Order during World War II was Executive Order 8802. This order prohibited racial discrimination in the national defense industry and created the Fair Employment Practice Committee (FEPC). The FEPC ensured that African Americans were given equal opportunities for employment in defense industries, including the military. This helped improve the treatment and opportunities for black soldiers during the war.
Learn more about Executive Order 8802 and its impact on black soldiers in World War II