President made Commander-in-Chief, 1867

President made Commander-in-Chief, Sept 3, 1867

Sept 3, 1867, Proclamation #2

President made Commander-in-Chief of the army and navy of the United States.

Warning all persons against obstructing the execution of the Constitution and laws, enjoining obedience thereto, and directing the officers of the army and navy to assist the courts and civil authorities.

Statutes at Large Vol. 15, Dec 1867 to Mar 1869, pages 697-698

See clearer version; http://www.constitution.org/uslaw/sal/015_statutes_at_large.pdf