The F123 Brandenburg class is a class of German frigate. They were ordered by the German Navy in June 1989 and completed and commissioned between 1994 and 1996, replacing the Hamburg-class destroyers. The ships primarily carry out anti-submarine warfare (ASW), but they also contribute to local anti-aircraft defenses, the tactical command of squadrons, and surface-to-surface warfare operations. Together with the F124 Sachsen class frigates, they are the mainstay of the German surface fleet.