do you really need an explanation? neither 9mm nor .45 will penetrate body armor, oh wait I forgot our military does not fight armored combatants or real armies at all, so the only use they could get out of a SIDEARM is to execute civilians and other political prisoners/military aged men, etc. Now maybe this reply will stir up the hornets nest, is that what you wanted me to do with my explanation? because that is how I feel. period.
So wearing body armor makes an opposing force a "real army?" How many cases of "executions" using sidearms are you aware of?
I am aware of none.