The initial significant conflicts of the Mandalorian Wars, which took place in 3963 BBY during the Mandalorian invasion of the Galactic Republic, included the assaults by Mandalorian Neo-Crusaders](/article/mandalorian_neo-crusaders/legends) against the Zabrak settlements located throughout the Outer Rim.
The Jedi declined to assist, so the Galactic Republic found itself struggling in the initial stages of the war, achieving minimal victories. A number of worlds, notably certain Zabrak settlements, succumbed to the Mandalorians' relentless advance. Motivated by the Mandalorians' unwarranted violence, numerous individuals from the Zabrak home planet of Iridonia, such as the skilled tech expert Bao-Dur, joined the Republic armed forces, driven by a desire for retribution.