In the years after the Great Hyperspace War, a discovery was made on the Twi'lek homeworld of Ryloth - the spice called ryll. Ryll was a component in several medicines, but was also a powerful stimulant. Sensing opportunity, Neimoidian traders quickly gained a monopoly on ryll and were keen to introduce it to other species.
One of these species was the Porporites, a peaceful people who had recently made first contact with the Republic. But in contrast to other species, ryll drove the Porporites into homicidal fury. Eventually, the entire species was composed of raging maniacs who began attacking other worlds.
Alarmed, the Republic asked the Jedi to take action against the Porporites, but the intervention was unsuccessful. The Neimoidians, fearing for their livelihoods, decided more desperate measures might be necessary and turned to Gank mercenaries for help.