He served the military during the Indian campaigns and the American Civil War, having earned distinction for gallantry on the battlefield.
He settled in Kansas and worked as a journalist and author of short stories and books of the plains and western frontier.
[4] His father died when he was a child and he was raised by his mother in Hempstead on Long Island for about five years before going away to the Athenian Academy in Rathway, New Jersey.
[1][3][5] He was made lieutenant-colonel for his service during the 1868-1869 Indian winter campaign in Kansas[1][3] under General Philip Sheridan, although the commission never appeared in his official record.
[2] Stationed at Fort Harker as a paymaster, he was tried for embezzlement and other financial issues 1870 to 1872 and was dismissed as a result of what may have been largely carelessness.
[3][10] Buffalo Bill was named as co-author because Inman used a number of quotes from Cody's autobiographical book, Story of the Wild West.
[3] At the time of his death, three books were being published, The Cruise of the Prairie Schooner, Muriel, the Colonel's Daughter, and Pick Smith, the Scout.
[9] He lived a great deal of his life in Kansas, first in military posts, then settling in Larned and then the Auburndale neighborhood of Topeka.