Brothers in Arms is based on the true story of the 502nd Parachute Infantry Regiment of the famed 101st Airborne Division who were dropped behind German Lines on D-Day. The game is based on the historical Mission Albany, in which the player has to complete true-to-life missions of the 101st.
Baker's squad consists of Cpl. Joe "Red" Hartsock, Cpl. Sam Corrion, Pfc. Jack Courtland, Pfc. Stephan "Obi" Obrieski, Pvt. Larry Allen, Pvt. Johnny Rivas, Pvt. Michael Desola, Pvt. David Muzza, Pfc. Thomas "Zano" Zanovich, Pvt. Michael Garnett and Pvt. Dale "Kid" McCreary. The Radioman is Pfc. Kevin Benjamin "Legs" Leggett. The squad is one of three under Platoon Sgt. Greg "Mac" Hassay. "Mac" served under Sgt. Baker's father, whom he had much respect for, in the First World War and has promised to himself to make Sgt. Baker into a good soldier.