Article 1, Section 8, Clause 16

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;

1.Sir Matthew Hale, History of the Common Law 1713 (posthumous)
2.William Blackstone, Commentaries 1:401--4, 1765
3.Records of the Federal Convention
4.Charles Pinckney, Observations on the Plan of Government, 1787
5."John DeWitt," NO. 5, Fall 1787
6.Alexander Hamilton, Federalist, no. 29, 181--87, 9 Jan. 1788
7.Federal Farmer, no. 18, 25 Jan. 1788
8.Luther Martin, Genuine Information, 1788
9.A Native of Virginia, Observations upon the Proposed Plan of Federal Government, 1788
10.Patrick Henry, Virginia Ratifying Convention, 5 June 1788
11.Melancton Smith, Proposed Amendment, New York Ratifying Convention, 2 July 1788
12.James Iredell, Proposed Amendment, North Carolina Ratifying Convention, 1 Aug. 1788
13.James Madison, Fourth Annual Message to Congress, 4 Nov. 1812
14.Vanderheyden v. Young
15.Gouverneur Morris to Moss Kent, 12 Jan. 1815
16.Houston v. Moore
17.William Wirt, Courts-Martial--New York Militia, 19 June 1821
18.Martin v. Mott
19.Joseph Story, Commentaries on the Constitution 3:§§ 1199--1210, 1833