Unrelated to the G.I. Joe franchise

(from ebookjapan):

1941. The Japanese attack Pearl Harbor, resulting in unjust discrimination against the Nikkei living in Hawaii. Joe, a second-generation Japanese American, is one of them. He is sent to a juvenile reformatory by an unreasonable policeman.

As the war situation became severe, the U.S. military, worried about the shortage of soldiers, made a plan to send the Japanese-American boys in the reformatory to the front lines as soldiers! Thus, an American captain comes to Joe and his friends, and the hellish military training begins!