Around 1740, the Plains tribes, including the Crow, started using horses. This allowed them to hunt buffalo more actively. The Crow became well-known horse breeders and dealers. Sometimes, their horses were stolen by tribes like the Blackfoot Confederacy, Gros Ventre, Assiniboine, Pawnee, and Ute. Later they had to fight the Lakota and their allies, the Arapaho and Cheyenne. The tribes in the Blackfoot Confederacy and the Lakota-Cheyenne-Arapaho alliance became their greatest enemies.