Zachary Taylor. Zachary Taylor was an American politician and military leader who served as the 12th president of the United States from 1849 until his death in 1850.
   Taylor previously was a career officer in the United States Army, rising to the rank of major general and becoming a national hero as a result of his victories in the Mexican-American War. As a result, he won election to the White House despite his vague political beliefs.
   His top priority as president was preserving the Union. He died sixteen months into his term, having made no progress on the most divisive issue in Congress, slavery.
   Taylor was born into a prominent family of plantation owners who moved westward from Virginia to Louisville, Kentucky, in his youth; he was the last president born before the adoption of the Constitution. He was commissioned as an officer in the U.S.
   Army in 1808 and made a name for himself as a captain in the War of 1812. He climbed the ranks of the military, establishing military forts along the Mississippi River and entering the Black Hawk War as a colonel in 1832. His success in the Second Seminole War attracted national attention and earned him the nickname Old Rough and Ready. In 1845, during the annexation of Texas, President James K. Polk dispatched Taylor to the Rio Grande in anticipation of a battle with Mexico over the disputed Texas-Mexico border. The Mexican-American War broke out in
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