|Hold it right there, outlaw!|
This article is littered with spoilers, so I reckon you might ought'a mosey on down the road if you don't want to read any plot details.
–American Army Captain to John Marston
Little is known of the Captain's background other than he rose through the ranks of the American Army to become a battle hardened veteran, who is shown to be perfectly capable of combat in harsher climates.
Red Dead Redemption
Marston first lays eyes on him when he, along with the two agents, arrives at the Army camp in the armored automobile. He tells Agent Ross that Van der Linde's men have taken the bait. Ross then tells the Captain to get his men into battle position. The Captain and his soldiers ride along side the automobile and provide cover fire for Marston on the machine gun, they press forward to Cochinay, killing many of Dutch's men on the way.
The automobile is eventually destroyed by explosives, Ross, Fordham, and Marston survive the explosion with only a few injuries. The Captain suggests that they get to Dutch before sundown, or he'll escape again. They all mount their horses and ride to Cochinay.
Along to way to Cochinay, John and the Captain share a friendly conversation about how strange the times have been. When they arrive at Cochinay's entrance, he orders one of his soldiers to blow the gate open. They fight their way through the camp, killing the rest of Dutch's men. When they progress to the final gate, Marston tells the Captain that he should tend to his wounded and that he must face Dutch alone.
The Captain is not seen again until the final story mission, in which he is a member of a firing squad.
Inside Fort Mercer, Marston encounters the Captain putting up a poster. Thinking that he has been given the work of underlings and is still hunting for bounty targets despite the rise of the undead, Marston jokes with him about it.
The Captain rounds on John, tersely pointing out that the posters are of people who are missing throughout the frontier and need to be found before they meet a grisly fate. Seeing that it is not a laughing matter, John decides to help rescue the missing persons. He can later on be encountered as one of the survivors wandering around Fort Mercer.
Red Dead Redemption
- "And You Will Know The Truth"
- "And The Truth Will Set You Free"
- "The Last Enemy That Shall Be Destroyed"
- The Captain is also not a fan of government interference, as he tells John Marston that his soldiers don't know who's giving the orders anymore.
- The Captain is an Officer of a U.S. Army Cavalry Regiment.
- In many ways the Captain is similar to Espinoza. They both are military captains, both fight alongside the Protagonist at first, they also shared a common enemy (Espinoza: De Santa, The Captain: Ross), and both later become antagonists.
- During the mission The Last Enemy That Shall Be Destroyed, some enemies may use the Captain's character model. Due to these circumstances, it is possible, but in no way can be confirmed, that the Captain himself appears.
- In Undead Nightmare, if Marston is to start throwing Undead Bait over the wall, the American Army Captain may either push Marston out of the Fort or start shooting him.