USA HISTORY

Detailed explanation-1: -The United States invoked the Monroe Doctrine to defend its increasingly imperialistic role in the Americas in the mid-19th century, but it was not until the Spanish-American War in 1898 that the United States declared war against a European power over its interference in the American hemisphere.

Detailed explanation-2: -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.

Detailed explanation-3: -Although initially disregarded by the great powers of Europe, the Monroe Doctrine became a mainstay of U.S. foreign policy. In 1823 U.S. President James Monroe proclaimed the U.S. protector of the Western Hemisphere by forbidding European powers from colonizing additional territories in the Americas.

Detailed explanation-4: -The context for the Monroe Doctrine was the collapse of Spanish rule in Latin America during the Napoleonic wars. With Napoleon dispatched at the Battle of Waterloo and “normalcy” returning to continental politics by the early 1820s, fears arose that Spain might try to reclaim its colonies.