Task Force 126 was a Starfleet task force extant in the late 24th century. It was part of the Starfleet Twelfth Fleet. In 2377-78, Commodore Seileach Corleigh was Task Force 126's commanding officer aboard the flagship USS Phoenix (a Nebula-class light cruiser). Task Force 126, deployed to the Klingon border, was then homeported at Troubador Station. (Ships of the Star Fleet, Vol. 4: Star Fleet Operating Forces. )