The colonies were expected to defend themselves. In reality that meant every man possessed and drilled with arms whether the were part of a formal militia or not. If there was an attack people would be "called up" to the militia. There is no requirement of belonging to a formal militia in the 2nd amendment. While times have changed, it was expectated that you were proficient with arms in the case that a formal militia was required to be formed.
The colonies were expected to defend themselves. In reality that meant every man possessed and drilled with arms whether the were part of a formal militia or not. If there was an attack people would be "called up" to the militia. There is no requirement of belonging to a formal militia in the 2nd amendment. While times have changed, it was expectated that you were proficient with arms in the case that a formal militia was required to be formed.