In the past, the possibility of your soldiers dying on the ground was a huge deterrent to frivolous strikes. Today, drones conduct major strikes without paying any heed to international borders. Drones conduct missions nobody would have imagined possible a few years back. While there is a huge benefit to the invading army in terms of reduction of fatalities, there is also a cheapening of war that lets commanders order strikes at their whim. I'm sure nobody in the US or NATO armies in Afghanistan admits this, but this happens in Afghanistan and Pakistan.