75th U.S. Army Reserve Innovation Command tech assessment teams evaluate C-sUAS during Operation Sentinel Justice 26
Army Reserve Soldiers with the 390th MP Battalion, 200th MP Command react to hostile activity during Operation Sentinel Justice 26 at Camp Shelby, Miss., June 12, 2026. OSJ 26 involved more than 12,000 reserve Soldiers, making it the largest training exercise in the history of the Army Reserve. (Army Photo by Sgt. 1st Class Sam Hartley, 75th U.S. Army Reserve Innovation Command)