It means men should be able to handle themselves with Arms should they need to go to War, either against foreign Enemies, or Domestic Enemies
Exactly! The historical record on this couldn’t be clearer. Which is why anti-gunners don’t like to discuss the context of gun rights, but deal exclusively in emotional appeals.
I can also see it meaning a Posse comitatus if a state of emergency exists (Hurricane, Big fire etc.) to act as guards or deputies. A county sheriff or a police chief should be able to call for civilian volunteer backup if needed.
It is NOT just a National Guard.
Always been my understanding: being proficient with your arms.