hasn't Ukraine already proved out autonomous weapons on the battlefield? There was a NYT podcast a couple years ago where the interviewed higher up in the Ukraine military and they said it's already in place with fpv drones, loitering, target identification, attack, the whole 9 yards.

You don't need an LLM to do autonomous weapons, a modern Tomahawk cruise missile is pretty autonomous. The only change to a modern tomahawk would be adding parameters of what the target looks like and tasking the missile with identifying a target. The missile pretty much does everything else already ( flying, routing, etc ).