John Simpson Chisum was a wealthy cattle baron on the frontier in the American West in the mid-to-late 19th century. As a rancher, he established large herds throughout the New Mexico territory, becoming known as the "Cattle King of the Pecos"; though his business ventures embroiled him in various conflicts, such as the Pecos War and the Lincoln County War. He is remembered as one of the most influential American cattlemen, and his name and life were remembered through memorials, books, films and shows.