Well, the order to George Bush is a government record, just as much as after action reports and the like.
I reach my conclusion because these documents would have no legal effect even if they were authentic. They are worthless, except as a matter of misrepresenting history.
You are dealing with the UCMJ, which has a narrower definition of intent than the common-law. The document you mention might fall afoul of the following, though.
18 U.S.C.A. § 912
Whoever falsely assumes or pretends to be an officer or employee acting under the authority of the United States or any department, agency or officer thereof, and acts as such, or in such pretended character demands or obtains any money, paper, document, or thing of value, shall be fined under this title or imprisoned not more than three years, or both.