Read this excerpt from Article I, Section 8 of the US Constitution.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;To provide and maintain a Navy;To make Rules for the Government and Regulation of the land and naval Forces;To provide for calling forth the Militia to execute the Laws of the Union, suppress Insurrections and repel Invasions