Munemori had volunteered for the
U.S. Army in November 1941, one month before the Japanese
attack on Pearl Harbor, and he was inducted in February 1942. Along with all other Japanese American soldiers, he was soon after demoted to
4-C class, removed from combat training and assigned to menial labor. This segregated army unit was made up entirely of Japanese Americans, with most initial recruits coming from Hawaii. The unit began as the
100th Infantry, initially listed as a separate battalion, and fought as part of the
133rd Infantry Regiment within the
34th Infantry Division. After the Allied
capture of Rome, the battalion withdrew from the front and became the 1st Battalion of the 442nd RCT. Munemori was sent to
Camp Shelby in January 1944 and, after completing his combat training three months later, joined the 100th Battalion in the European Theater. Fighting in Italy and France, he participated in the rescue of the
Lost Battalion before arriving on the
Gothic Line, where he was killed in action saving the lives of two of his comrades. ==Awards and decorations==