Howitzer Training A member of the Michigan Army National Guard fires an M777 155mm howitzer as part of a direct fire training exercise during Northern Strike at Camp Grayling, Mich., July 25, 2020. SHARE: Download: Full Size (2.69 MB) Tags: northern strike, Army Credit: Army Sgt. Adam Parent VIRIN: 200725-A-ZZ999-001.JPG Photo Gallery