The problem they had was putting ALL of their eggs in repeating future warfare for three years in a row.
I think a cool way around this would be to have a story of a time traveling soldier who has to fight in multiple eras in the same campaign. It could also make for some super cool multiplayer, and not as far-fetched as it sounds. In Somalia in 1993, one of the Delta Force guys carried a relatively ancient M14 (already ~40 years old at that point!), and absolutely owned with it. Hell the M1911 is over 100 years old and still perfectly effective.







