The USS Corregidor (NCC-41606) was a modified Galaxy-class (variant design) Federation starship from an alternate timeline. During the latter decades of the 24th century in this timeline, the Federation had fallen to invasion by a race known as the Usurpers. Corregidor, one of a handful of Starfleet vessels which withstood the assault, traveled through time in a failed attempt to prevent the invasion, emerging in early 2387 in the UFS Arcadia's temporal reality.