USS Valiant (TRX-1701)

The USS Valiant (TRX-1701) was a Federation starship, a heavy cruiser in service to Starfleet in the 23rd century. The ship was a contemporary of the Constitution-class USS Valiant (NCC-1709). 

History
During a detailed scan of an unexplored star system, the Valiant came under attack from a massive starship, which destroyed the Federation ship with all hands. On stardate 7###.8 (circa 2270), the USS Trexelprise (TRX-1701) was assigned to the region, despite still being under construction, to determine the Valiant's fate and to continue its mission of exploration. ( intro)