Trihexalon
this biological weapon was developed several years before the onset of the Clone Wars. Known in certain circles as Dragon's Breath, it served as the basis for many bio-weapons developed by the Separatists, and this simple fact allowed the Old Republic's Ministry of Science to quickly identify vaccines to counteract it. The primary Trihexalon production facility established by the Separatists was on Nod Kartha, until Adi Gallia and Nym destroyed it, just prior to the Battle of Geonosis.