A Federation starship of the early 25th century that took part in the Frontier Day review of 2401 and was destroyed by the assimilated fleet when its officers regained the bridge.
This USS Excelsior carried on the name of Hikaru Sulu's ship into the 25th century. It is among the ships that gather around the Stargazer in the second season of Star Trek: Picard, and it returns for the Frontier Day celebrations in the third.
In Vox, the Borg signal sent through the fleet takes over every crew member under twenty-five, and the new fleet formation system links all the ships under one command. On the Excelsior some of the older officers fight their way back and retake the bridge. They call out to the Titan that they are free.
The response is immediate. The rest of the fleet turns its weapons on the Excelsior and destroys it, a show of what awaits any ship that breaks from the Collective.