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'''James Knox Polk''' was the 11th [[President of the United States]]. He lived from 1795 to 1849.<ref>[[Encyclopedia of Presidents James K. Polk]] by Dee Lillegard, Children's Press, 1988.</ref>He was elected in [[United States presidential election, 1844|1844]] as a Democrat and served as president from 1845-1849.

'''James Knox Polk''' was the 11th [[President of the United States]]. He lived from 1795 to 1849.<ref>[[Encyclopedia of Presidents James K. Polk]] by Dee Lillegard, Children's Press, 1988.</ref>He was elected in the [[United States presidential election, 1844|1844 Presidential Election]] as a Democrat and served as president from 1845-1849.

Polk launched an invasion of [[Mexico]] to prevent an imminent Mexican attack on [[Texas]].  

Polk launched an invasion of [[Mexico]] to prevent an imminent Mexican attack on [[Texas]].