. . "1941" . . "70px|alt=Insignia of Combined Operations units it is a combination of a red Thompson submachine gun, a pair of wings, an anchor and mortar rounds on a black backing" . . . . . . . "No. 51 Commando" . . . "1940" . . . "No. 51 Commando" . . . . "Coastal raiding force" . "Battalion" . . . "No. 51" . . . . "Assault Infantry" .