U.S. Army

The U.S. Military (The U.S. Army in particular) appears in Red Dead Redemption. They fight along side Marston in the hunt for the leader of Dutch's gang. The Army appears to cooperate with the infant Bureau of Investigation, as seen by the fact the Army soldiers fight Dutch's gang, as well as come for Marston himself. American army soldiers are also a playable character faction in the multiplayer game mode.

Multiplayer Characters
Player Models include the following:
 * 1) Slick Nick Funtz
 * 2) Tall Trees Ty
 * 3) Gaptooth McGee
 * 4) Big Bob Moorcock
 * 5) Frederick Littlefield
 * 6) Stephen Paul
 * 7) Jan Booth
 * 8) Eric Morgenson

Time Period and Equipment
Red Dead: Redemption takes place around the same time period as the punitive expeditions into Mexico to capture or kill Pancho Villa. This is evidenced by the game's U.S. Military vs. Rebeles Gang mode, as well as the khaki uniforms and hats (first worn during the punitive expedition) and weapons, namely the Krag-Jørgensen (Bolt Action Rifle) and Colt Peacemaker (Cattleman Revolver).

Trivia

 * The similarities between the uniform of the United States Army and the Mexican Army causes issues to players in identifying them. The main difference is the fact the U.S. Army uniforms are khaki colored and more clean and kept (with the exception of mud and dust splotches on some uniforms), while Mexican uniforms are grey, well worn and loose.