 Sikh participation as a part of U.S. forces in World War I was limited due to their small population in the country, but 138,000 Sikhs served in other Allied forces.Large numbers of Sikhs served in U.S. forces during World War II, and all American wars following.During World War II Sikh units of the Indian and Commonwealth forces served under Allied command alongside or in cooperation with American forces and earned a reputation for bravery, serving notably against the Germans and Italians in East Africa, North Africa, Italy, France, Western Europe and against the Japanese in the China-Burma-India Theater.