The Swarm of the Torrasque is a zerg mercenary group led by the Wise Old Torrasque, seemingly maintaining its independence from Sarah Kerrigan's control. It features all the zerg strains along with Empress Queens, which are basically upgraded versions of their counterparts.
At some point after the Brood War, the group offered its services to the Terran Dominion to deal with the New Trinidad Pirates.
1999-03-26. StarCraft. Vivendi Games. Mission: Mercenaries (in English). Map Archives: Mercenaries. StarCraft Compendium Map Archives.