 Pressure over land ownership and control increased due to discoveries of gold in various parts of Montana and surrounding states.Major battles occurred in Montana during Red Cloud's War, the Great Sioux War of 1876, and the Nez Perce War and in conflicts with Piegan Blackfeet.The most notable were the Marias Massacre (1870), Battle of the Little Bighorn (1876), Battle of the Big Hole (1877), and Battle of Bear Paw (1877).