The Great Sioux War of 1876–77 was conducted by the Lakota under Sitting Bull and Crazy Horse. The conflict began after repeated violations of the Treaty of Fort Laramie (1868) once gold was discovered in the hills. By far the most famous battle was the one-sided Indian victory at the Battle of the Little Bighorn, in which combined Sioux and Cheyenne forces defeated the 7th Cavalry, led by General George Armstrong Custer. The West was largely pacified by 1890, apart from small Indian raids along the Mexican border.