Grzegorz Stankevičius was a Naval Officer during the Human-Covenant War. Born in January 2521, he joined the UNSC Navy as soon as he was old enough. In 2551, he was promoted to Captain and given command of the the UNSC Sarajevo, a London-class Battleship. He survived the war, and returned to civilian life afterwards. He was killed in an armed robbery in October 2566.