The GOP is our testosterone-fueled Daddy Party, so the factions universally support high levels of defense spending, albeit for somewhat different reasons. CLs accept it, for the most part, because they view defense as one of the few legitimate functions of government; PBPs support it because it is directed largely at communist states they abhor; CDs want to use the military to bring democracy and prosperity to the entire world; and Reactionaries like displays of patriotism and swagger.
Of course, the factions don’t necessarily agree on what the military is actually supposed to do. CDs and PBPs generally have an internationalist outlook; CLs and Reactionaries lean towards isolationism. This is a battle that emerged during the Trump years and will become more conspicuous during the 2024 primaries.