The Grey Brotherhood War, or Grey War for short, was a conflict that took place in 21 ABY in the eastern Outer Rim. The participants were the Baroonda Consortium and Hutt Space on one side, against the Imperial Remnant on another side, and the New Jedi Order's secret Project 37 strike team as a third faction. The first battle was the Ambush over Kessel. There were several battles in the war, and it lasted three years, until the Treaty of Fire Mountain Rally was signed by the participants. However, the New Jedi Order never signed as its participation was entirely covert.