> and not everyone will have robots This kinda plays out already - where not every "side" has a military or soldiers, so the battle is fought between soldiers

> and not everyone will have robots This kinda plays out already - where not every "side" has a military or soldiers, so the battle is fought between soldiers and "civilians". Any battle between a state with drone invading forces and one without, is going to be indistinguishable from an invading robot army indiscriminately killing all the civilians.