Carleton then decided to move the Navajo and Apache to reservations. Initially, he intended to make the Rio Grande valley safer for settlement and end the raids on travelers. He began by forcing various bands of Mescalero and Navajo onto the reservation at Fort Sumner. He enlisted Kit Carson, one-time friend of the Navajo, to round them up by destroying their crops and livestock, and forcing them on The Long Walk to Fort Sumner. Carleton later fought the First Battle of Adobe Walls, the largest Indian War battle of the Great Plains.