Unless they are properly trained armed civilians just get themselves and other people killed and have no impact on the enemy.

Compulsory military service for all so that people get training. I can agree with that. Giving guns to civilians willy nilly after the professional military has failed. That's dangerous, stupid and makes people illegal combatants without Geneva Convention protections.

Indeed I've never understood how the "a well regulated militia" words in the Second Amendment are always ignored. Training as part of a well regulated (ie with discipline and proper command and control) militia is an essential part of military effectiveness.