what is this doctrine ?
It was a United States policy that opposed European colonialism in the Americas.
Monroe Doctrine
The Monroe Doctrine was a United States policy that opposed European colonialism in the Americas. 
what military hero from the mexican war became potus Zachary Taylor. who is this person? He was the 12th president of the United States. did he serve in the military? Yes, he was a career officer in the United States Army, rose to the rank of major general. where was he born? Orange County, Virginia. where is this country located? UNANSWERABLE what is the geography of this country? UNANSWERABLE where is the aforementioned county located? In the Central Piedmont region of the Commonwealth of Virginia. what was the role of the person (mentioned in the beginning) during the war of 1812? He successfully defended Fort Harrison in Indiana Territory from an Indian attack commanded by Tecumseh. was he promoted for this success in 1812 war? Yes, he received a brevet (temporary) promotion to the rank of major. who was the president during his period as a commander of fort howard? James Monroe. how long did he serve as a president ? From 1817 to 1825. what were some of the major achievements during his presidency? He is perhaps best known for issuing the Monroe Doctrine.
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Monroe Doctrine [SEP] Introduction
The Monroe Doctrine was a United States policy that opposed European colonialism in the Americas. It began in 1823; however, the term "Monroe Doctrine" itself was not coined until 1850. The Doctrine was issued on December 2, at a time when nearly all Latin American colonies of Spain and Portugal had achieved, or were at the point of gaining, independence from the Portuguese and Spanish Empires. It stated that further efforts by various European states to take control of any independent state in the Americas would be viewed as "the manifestation of an unfriendly disposition toward the United States." At the same time, the doctrine noted that the U.S.