There is! !credibledefense@sh.itjust.works

Though it hasn't been active in awhile.

Edit: Also the other !noncredibledefense@sh.itjust.works community is more lively than this one.

Just some that are somewhat relevant: !combatvideos@sh.itjust.works !combatfootage@sh.itjust.works !ukraine@sopuli.xyz !military@lemmy.world !geopolitics@lemmy.world

One exists, but the mod is AWOL and the community needs some love. If you (or anyone else here in the comments) wants to take it over and bring it back to life, let me know.

!credibledefense@sh.itjust.works