Clarence Edwin Carter has written:

'The territorial papers of the United States'

'Some notes on Ohio historiography' -- subject(s): Historiography, History

'The territorial papers of the United States' -- subject(s): Sources, History, Territorial expansion

'Territory of Orleans, 1803-1812 (Territorial Papers of the United States)'

Territorial expansion refers to the increase of a country's land area through various means such as conquest or negotiation. An example sentence could be: "The United States engaged in territorial expansion during the 19th century, gradually acquiring land through treaties, purchases, and military conquest."

No, United States is actually a union of states, which can be categorised under Unions, Federations and sometimes Confederations. However, at certain times of its history, United States was referred to as an imperialist power(like empires) due to its rapid territorial expansion.

The Pacific Charter was an agreement between the United States and Great Britain that neither country would pursue territorial expansion. The 2 countries signed the agreement after World War II.

Mississippi Territorial is the admission of Mississippi. This is in the United States.