A Starfleet vessel destroyed by the Borg cube at the Battle of Wolf 359 in 2367, one of the wrecks identified by Shelby as the Enterprise-D passes through the debris.
The USS Tolstoy is named in the Next Generation episode The Best of Both Worlds, Part II. It is part of the fleet of forty starships that Admiral Hanson gathers at Wolf 359 to stop the Borg cube heading for Earth, a fleet that Locutus, with Picard's knowledge, destroys almost completely.
When the Enterprise arrives too late to help, Shelby reads off the names of wrecked ships as they drift past on the viewscreen, the Tolstoy first among them, followed by the Kyushu and the Melbourne.
Nothing is said about its captain or crew. The ship is named after the Russian novelist Leo Tolstoy, and stands with the others as shorthand for the thirty-nine ships and roughly eleven thousand lives lost in the battle.