Cruiser Squadron 31 was a tactical unit of the Royal Manticoran Navy. It comprised a number of Edward Saganami-C-class heavy cruisers and was under the overall command of Commodore Sean Magellan. In the summer of 1922 PD, executing Case Lacoön, he took it on a mission to blockade a number of wormholes in Solarian space with the support of several LAC carriers. (HH13)