The declared that the united states would oppose any efforts by an outside power to control the nations in the western hemisphere.

northwest ordinance

tariff of 1828

monroe doctrine

containment policy

Monroe Doctrine.   The Monroe Doctrine was a U.S. foreign policy regarding domination of the Americas in 1823. It stated that further efforts by Europeannations to colonize land or interfere with states in North or South America would be viewed as acts of aggression, requiring U.S. intervention.[1] At the same time, the doctrine noted that the United States would neither interfere with existing European colonies nor meddle in the internal concerns of European countries.

Ancient Greece Polis

Explanation:

A polis (plural: poleis) was the typical structure of a community in the ancient Greek world. A polis consisted of an urban centre, often fortified and with a sacred centre built on a natural acropolis or harbour, which controlled a surrounding territory (chora) of land.