Basilisk was home to the Basiliskans, an intelligent lizard species. They were the creators of the Basilisk war droids, that were rumored to be modeled after themselves. During their war with the Mandalorians around the year 4017 BBY, the Basiliskans chemically poisoned their own planet, in a last effort to defeat their conquerors. Despite receiving Jedi and Republic reinforcements under Sidrona Diath at the Battle of Basilisk, the Mandalorians conquered the planet and enslaved the remaining Basiliskans. The New Republic captured the planet at some point after the Battle of Endor.