Final answer:
Japanese Americans serving in WWII were restricted to the European Theatre due to racism, discrimination, and fear of espionage, as evidenced by their forced relocation and internment in camp.
Step-by-step explanation:
The Japanese Americans serving in WWII were restricted to the European Theatre due to widespread racism, discrimination, and fear of espionage or sabotage by Japanese Americans living in the United States. After the Japanese attack on Pearl Harbor, President Roosevelt issued Executive Order 9066, which authorized the forced relocation and internment of over 110,000 Japanese and Japanese Americans into internment camps across the country.
Although there was little evidence of disloyalty or threat posed by Japanese Americans, their ethnicity alone led to their imprisonment, while Italians and Germans suspected of disloyalty were not subjected to the same mass exclusion and detention. It wasn't until 1988 that the U.S. government formally apologized for internment and provided reparations to surviving internees.