Humans that lived in Montana during the era of Post-World War III
Post-World War III was the era of history that followed World War III. Although this era was remembered for its troublesome events, such as the post-atomic horror, this time period also saw much advancement in terms of space travel, after all, it was in 2063 that Zefram Cochrane made his first successful warp flight in the Phoenix.
In 2381, when Beckett Mariner, D'Vana Tendi, Sam Rutherford, and Brad Boimler visited Historical Bozeman, Rutherford noted that the way everyone dressed was just like Post-World War III. (LD: "Grounded")