S4·E11 Civil War At Deadwood

Confederate veteran Muskets Corby, and Union veteran Hannibal Samson are sworn enemies. After Hannibal is robbed by a man in an old army uniform, Muskets is promptly accused. After Hannibal's horse is found in Musket's corral, he is jailed. Gene and Pat ride in to convince the sheriff to free Muskets, and promising to return the stallion. Afterwards, Hannibal vows to kill Muskets. Hannibal's lawyer is after Muskets's deed to his rnach if he's dead. In his office, Gene finds the army uniform the was worn by the robber. Gene then switches outfits with Muskets, and when the outlaws attack, Gene takes them by surprise. After they're taken in, Hannibal and Muskets give up their life long feud to share a treasure buried underneath the border of their ranches.