NATION...Black’s Law Dictionary 5th  edition defines a nation as:

“A people, or aggregate of men, existing in the form of an

organized jural society, usually inhabiting a distinct portion of the earth, speaking the same language, using the same customs, possessing historic continuity, and distinguished from other like groups by their racial origin and characteristics, and generally, but not necessarily, living under the same government and sovereignty. Montoya v. Georgia, 31 U.S. (6 Pet.) 515, 8 L.Ed. 483.) In American constitutional law the

word “state” is applied to the several members of the American union, while the word “nation”

Contracts

Agreements between two entities, creating an enforceable obligation to do, or to refrain from doing, a particular thing.

is applied to the whole body of people embraced within the  jurisdiction of the federal government