PRE-TOS Tannhäuser Class

speeds. UES TANNHÄUSER and her sister ships UES VICKSBURG (CHM-57) and UES MARATHON (CHM-60) joined the fleet in May 2157, just in time to take part in the Battle of Hell\'s Gate in October 2157. The 15 TANNHÄUSER ships built continued to serve effectively throughout the war but were relegated to secondary roles when UESN became the basis of Starfleet in 2161.
An unusual feature of TANNHÄUSER ships was the extreme forward placement of the directional nacelles in a \"hammerhead\" arrangement, which was done in an attempt to increase maneuverability at warp