[Pyxl101]

The US Supreme Court analyzed the meaning of the 2nd Amendment in District of Columbia v. Heller:

> [We] explained that “the Militia comprised all males physically capable of acting in concert for the common defense.” That definition comports with founding-era sources. [...]

> Finally, the adjective “well-regulated” implies nothing more than the imposition of proper discipline and training. [...]

> There are many reasons why the militia was thought to be “necessary to the security of a free state. [...] When the able-bodied men of a nation are trained in arms and organized, they are better able to resist tyranny.

https://www.law.cornell.edu/supct/html/07-290.ZO.html