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Kingdoms of the Iberian Peninsula
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.
One of the tactics that Filipino insurgents used to undermine American power was "guerrilla warfare" mostly due to the fact that the Filipinos knew the land and territory far better than the Americans.