Japanese Americans in army train to avenge Pearl Harbor; 100th Infantry Battalion officers and some of the enlisted men are of Japanese ancestry. American citizens, born in the Hawaiian Islands of unquestioned loyalty and patriotism. Formerly part of the Hawaiian National Guard; Cpl. Toratsugu Ryusaki and Sgt. Masao Uehara working on the motor of a 6 x 6 Army truck. 1943.