U.S. Army Missouri National Guard Lt. Col. T.J. Halls, 1st Battalion, 1st Infantry Regiment Commander, describes his experience during Orient Shield 25 at Sekiyama Training Area, Niigata, Japan, Sept. 20, 2025. OS25 is a large-scale U.S. Army, Japan Ground Self-Defense Force (JGSDF) and Australian’s field exercise that focuses on converging U.S. Army Multi-Domain Operations and JGSDF Cross-Domain Operations through bilateral field training and live fire exercises that focus on a dynamic forward