You pegged it!
No he didn't. This is the exact wording of an enlisted promotion warrant in the United States Marine Corps:
To all who see these presents, greetings. Know ye, that reposing special trust and confidence in the fidelity and abilities of John L. Doe 123 45 6789, I do appoint this Marine a Sergeant in the United States Marines Corps to rank as such from the 1st day of November two thousand and two.
This appointee will therefore carefully and diligently discharge the duties of the grade to which appointed by doing and performing all manner of things thereunto pertaining. And I do strictly charge all personnel of lesser grade to render obedience to appropriate orders. And this appointee is to observe and follow such orders as may be given from time to time by superiors acting according to the rules and articles governing the discipline of the Armed Forces of the United State of America.
Given under my hand at Headquarters United States Marine Corps this first day of in the year of our Lord two thousand and two.
Signature
Commandant of the Marine Corps
The bolded portions change from warrant to warrant. Snippy's post number 4 is correct for officers in the Corps though.