User blog comment:Cfp3157/Season 1 Episode 8: Rough Riders vs German Stormtrooper/@comment-4552610-20120801025115/@comment-5078776-20120801140648

Because what would the Rough Riders have tp compete with against the MP18? They didn't have SMG's during the late 1800's. Against the Gatling GUn would be unfair, and you can't have Rough Riders without Gatling Gun.