In early 2367, an attacking Borg cube crossed the planetary defenses between Jupiter and Mars. It was able to easily break through the defensive lines, destroying the ships sent to intercept it within a matter of seconds. (TNG: "The Best of Both Worlds, Part II" ) In 2368, a ship of the same type was stored in the ship graveyard of Surplus Depot Z15. (TNG: "Unification I" )