In 31 BBY, Karae Nalvas deceived Dr. Shilaea Motacc, a galaxy-wide expert in large scale propulsion systems, to work for him. Nalvas pretended to be Fesvk Wefos, a manager of a company called Usable Resource Location, Recovery, and Development Corporation (U.R.L.R.D.), and told Motacc that he wanted her to develop a new kind of propulsion system for flying cities. However, Nalvas really wanted to use her designs in the Conkesta.
Nalvas managed to build a shielded, armored, flying fortress with enough firepower to destroy any of the cities on Genarius. He staffed the Conkesta with some six thousand sentients, which he brought in several small trips from outside the system. The propulsion systems were based on Motacc's designs, and as such they were very advanced.