Ben Jackson told Polly Wright that he had to get back to barracks, which was some hours away from Cornwall. (TV: The Smugglers)
During the first Nestene invasion of Earth in the late 20th century, Auton dummies were reported to be attacking barracks all over Britain. (TV: Spearhead from Space)
A Roman soldier was in his barracks when the Celestial Toymaker approached him, then lured him to the Toyroom for a game. (COMIC: The Greatest Gamble [+]John Peel, DWM backup comic stories (Marvel Comics, 1981). Page 42.)