The goal of the Monroe Doctrine, announced by President James Monroe in 1823, was to establish the Western Hemisphere as a sphere of influence separate from European powers, thereby preventing further European colonization or interference in the Americas. Specifically, it aimed to:

• Assert that the American continents were no longer open to colonization by European powers.
• Declare that the United States would not interfere in European internal affairs or existing European colonies in the Americas.
• Warn that any attempt by European nations to extend their political system or colonize new territories in the Western Hemisphere would be considered a hostile act against the United States.
• Protect the newly independent Latin American countries from European intervention, thereby securing American national security and influence in the region

In essence, the Monroe Doctrine sought to prevent European powers from reasserting control over former colonies in Latin America and to discourage new colonization efforts, establishing the U.S. as the dominant power in the Western Hemisphere and safeguarding its security interests