Peace dividend
The only peace dividend happened under Clinton after the Cold War ended. Republicans whined that he was weakening US defense and they continued to play that tired old line under Obama - despite the fact that the US spends more on defense than the next 7 or 10 (whatever the number is today) countries combined. Trump campaigned on a promise to rebuild our military that he claimed Obama had "gutted" so that means more pork for his fat cat campaign contributors he's been appointing to his administration.
You don't fight ISIS with F-35s and destroyers, but that doesn't matter - to military contractors the answer to every problem from the next Hitler to terrorists wielding IEDs to kids egging your house on Halloween is major weapons programs with costs measured in billions, or ideally, trillions.