>has never invaded a distant country Honest question for those in the know: at what point in history did non-adjacent invasions become feasible and beneficial?

>has never invaded a distant country Honest question for those in the know: at what point in history did non-adjacent invasions become feasible and beneficial? I'd imagine if a country ever had a large army and a desire for more land, they would choose neighbors just because of how much simpler it'd be to fight and rule after conquering.