The Mandalorian Crusaders conquered the planet of Kuar and set up camps there.[1] They wiped out most of the native Kuarians.[4] When Ulic Qel-Droma later challenged Mandalore the Indomitable to a duel, it was held on Kuar because the Mandalorians already controlled the world.[1]
Sources
"The History of the Mandalorians: Exploring the Evolution of a Mighty Race of Warriors" — Star Wars Insider 80- The Essential Atlas
- The Essential Guide to Warfare
"10 Great Military Leaders" — Star Wars Insider Special Edition 2013