The US Supreme Court analyzed the meaning of the 2nd Amendment in District of Columbia v. Heller:<p>&gt; [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. [...]<p>&gt; Finally, the adjective “well-regulated” implies nothing more than the imposition of proper discipline and training. [...]<p>&gt;  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.<p><a href="https:&#x2F;&#x2F;www.law.cornell.edu&#x2F;supct&#x2F;html&#x2F;07-290.ZO.html" rel="nofollow">https:&#x2F;&#x2F;www.law.cornell.edu&#x2F;supct&#x2F;html&#x2F;07-290.ZO.html</a>