The Constitution – Article I, section 8, clauses 12-14

Army Clause

“The Congress shall have Power…To raise and support Armies, but no Appropriation of Money to that Use shall be for a longer Term than two Years…”

Navy Clause

“The Congress shall have Power…To provide and maintain a Navy…”

Military Regulations

“The Congress shall have Power…To make Rules for the Government and Regulation of the land and naval Forces…”