This territory was received as a part of the peace settlement with Britain at the end of the Revolutionary War. Oregon Territory
Ceded by britain
Treaty of Paris
Spanish Cession

Treaty of Paris

Explanation:

Perhaps as important as U.S. independence, the Treaty of Paris also established generous boundaries for the new nation. As part of the agreement, the British ceded a vast area known as the Northwest Territory to the United States.

in 1897, pershing became a tactical officer at west point, and that's where he was given the nickname "black jack." pershing's first name is "john," for which "jack" is a nickname, and he was a white man who commanded black troops. hence "black jack".

a social contract.

"a social contract is an agreement between citizens and their leader where the citizens give up certain freedoms in exchange for protection. the constitution of the united states is an example of a social contract."