People forget that one of original lines of the Internationale were "Our bullets are for our own generals"
EDIT: You know what, no, that's not the post. Does anyone remember who the most effective activists against the Vietnam War. The Vietnam Veterans Against War. The conservatives literally had to concoct a mythology that anti-war activists fucking hated the troops to the point that they spit on returning veterans.
Bourgeois professional militaries literally have their own inherent class divide in officers vs enlisted.
The entire reason historical wars became so unpopular was because of drafts and conscription, which is inherently polarizing due to affecting different segments of society unequally based on class. Conscripted armies are literally a means of socialization and consciousness-forming for the working class in the exact same way concentrated industrial enterprises are. Conscript armies become pressure cookers for class-based social unrest and dissent. This is precisely the reason they abolished the draft after Vietnam and will never actually reinstitute it. Just like police, professional volunteer-only militaries inevitably become hotbeds of reaction and hubs for reactionary indoctrination, pitting the professional soldiers and professional cops against cowardly, soft "civilians".