Trekipedia

U.S.S. Enterprise NCC-1701-C

The Ambassador class Starship Enterprise, commanded by Captain Rachel Garrett, was destroyed by Romulans while defending a Klingon colony at Narendra III in 2344. Although the starship was equipped with state-of-the-art weaponry and defensive systems, it was no match for the combined power of four Romulan warbirds.^[1]

During its defense of Narendra III, the Enterprise entered a temporal rift and traveled 22 years into the future. Most of the senior staff were killed during the initial encounter with the Romulans, but Captain Garrett and Lieutenant Richard Castillo survived. In this future, the Federation was at war with the Klingons. However, it appeared that this timeline had occurred because the Enterprise was unable to complete its defense of the Klingon outpost before it entered the rift. When the starship returned to its own time and completed its final mission, the war was averted before it had ever begun.^[1] Later accounts proved that there were in fact some survivors of the battle, who were captured and taken to Romulus.^[2]