WW2 - shooting at a fella as he came down in a parachute was looked on as a war crime - but I am sure they do it now
Also snipers - if they were caught with telescopic sights they were shot out of hand ( my father said ) whereas now - every one has one.
At wormhout
https://en.wikipedia.org/wiki/Wormhoudt_massacre
the SS killed surrendered and disarmed prisoners - one of my fathers colleagues was an eye witness and the trial 1946 was abandoned when it was successfully pleaded that most of the perps had died at Stalingrad.
also inbolved in the massacre at Malmedy - where they were acquitted as they successfully pleaded that they had been tortured by the Allies into false confessions
and you know if you shoot someone who has surrendered and is armless and do it on viddie - you can expect to face consequences....
Baha Moussa's final words were 'why are you doing this to me ?'
the enlisted men were beating up Iraqis before interrogation to soften them up according to oral testimony - such is the way to win hearts and minds - but that is not the right way round, is it ?
Nonetheless I find 'historical' a heart-sink word - all it means is more money for the lawyers and some of the events relate to 2003 .....