Military Intelligence Service (MIS)
In November 1941, a secret language school was established at Crissy Field on the Presidio of San Francisco to teach Japanese to carefully selected U.S. soldiers, most of whom were of Japanese ancestry. The school, called the Military Intelligence Service Language School, moved during the war, first to Camp Savage, Minnesota, then to Fort Snelling, Minnesota. After WWII, the school was re-established at the Presidio in Monterey, California as the Defense Language Institute (DLI).

Graduates of the school served on active duty in the Pacific Theater as interpreters and helped decode intercepted Japanese battle orders. They wrote pamphlets urging Japanese Imperial troops to surrender and were active in the battles of Iwo Jima and Okinawa. Many times, the interpreters exposed themselves to especially hazardous duty while trying to convince Japanese soldiers in caves to come out and surrender.

After the Japanese surrendered in August 1945, many Japanese American members of MIS were involved in the Occupation and performed valuable services in the administration of Japan immediately after the end of the war. By 1946, approximately 6,000 of the total 33,000 Japanese Americans who had served were associated with the Military Intelligence Service.

The story of Japanese Americans in the service of their country is one of sacrifice and heroism. Despite the many obstacles they encountered, loyal Americans of Japanese Ancestry were determined to serve and thousands did so with distinction, nearly 800 making the ultimate sacrifice by giving their life in honor of the United States.