Interesting bit of history. Did you know that the 2nd Amendment is not the only place that mentions the militia? A lot of folks don't realize that the Congress is actually who calls out the Militia, as well as who organizes, arms, disciplines, etc. them - although it's the States who get to select the officers.
Here it is...
Article 1, Section 7:
- To provide for calling forth the Militia to execute the Laws of the Union, suppress Insurrections and repel Invasion;
- To provide for organizing, arming, and disciplining, the Militia, and for governing such Part of them as may be employed in the Service of the United States, reserving to the States respectively, the Appointment of the Officers, and the Authority of training the Militia according to the discipline prescribed by Congress;...