The 100th Infantry Battalion is a unit of the United States Army that was formed during World War II. It is notable for being the first all-Nisei (Japanese American) combat unit, composed primarily of Japanese Americans from Hawaii and the mainland. The battalion fought bravely in Europe, earning numerous awards for its valor and contributions to the war effort. The 100th Infantry Battalion was activated in 1942 and became part of the 442nd Regimental Combat Team, which is recognized as one of the most decorated units in U.S. military history. The soldiers faced significant challenges, including prejudice and discrimination, yet they demonstrated exceptional courage and loyalty, serving with distinction in various campaigns.