Honor hasn't changed, unless you refer to "honorable combat" by facing your opponent without traps or tricks, which wasn't even done back then. As for individual skill, well I'd actually yes, required skill has diminished. Learning to use firearms is easier than learning to use a sword, spear, bow and shield, not to mention fighting from horseback and all the other crazy ways people fought. Now then, that said, the tactics required I think have actually been raised. With so many ways to kill people quickly and easily, people have to account for small elite teams, endless different traps, air attacks, precise artillery strikes, hidden snipers, suppressive fire, high explosives like grenades or grenade launchers, heavy vehicles, rapid reinforcements, hell even infantry attacking from the sky in a H.A.L.O. or H.A.H.O. jump, and that's just off the top of my head.
Also, I have to disagree with your one man not making as much of a difference, because one man can make
all the difference. Simo Hayha killed 700 men by himself. In the Boxer Rebellion Dan Daly held his section of the wall by himself and got the Medal of Honor for it. Audie Murphy was a scrawny guy (think Captain America before the injections) and basically wrecked everyone he came across, even when horribly outmatched. It's easier to kill now, so one person can have a much larger impact.
theparsonski said:
If that was, say, 300 SAS men against even 2000 Taliban insurgents, I reckon the Taliban would end up winning.
I'd actually give the SAS a fair chance. First off, they are highly trained crazy people (my uncle once dated a woman who's father is in the SAS) and they wouldn't stand there while 2000 Taliban fire on them. Hit and run attacks, ambushes, high explosives, feints, sniping, and more. The SAS are all about working in small teams, so being greatly outnumbered is basically par for the course. Remember, it's way easier to kill someone in today's world, so fewer men can do larger damage. Besides, the SAS would be pretty hard to find with few numbers, while the Taliban would be pretty easy to find and kill in your situation.
Edit: Before anyone misunderstands, I meant required skill to use against another person singularly, not actual average skill people have/had, as in two people fighting with broadswords as compared to two people fighting with pistols or assault rifles.