Question

What was the Monroe Doctrine, and why did it grant the United States power in other countries?

Answer 1

The U.S. wouldn't interfere with existing European colonies or territories in the Western Hemisphere. European powers wouldn't attempt any further colonization in the Western Hemisphere. The U.S. would view any European attempts to colonize or control nations in the Western Hemisphere as hostile acts.

Step-by-step explanation:

The Monroe Doctrine is the best known U.S. policy toward the Western Hemisphere. Buried in a routine annual message delivered to Congress by President James Monroe in December 1823, the doctrine warns European nations that the United States would not tolerate further colonization or puppet monarchs.