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Olive Branch and Sword: The United States and Mexico, 1845-1848
Olive Branch and Sword The United States and Mexico 18451848 Author:Dean B. Mahin On May 14, 1846, the U.S. Congress declared that war had begun with Mexico. In 1847, Nicholas P. Trist was sent on a diplomatic mission to deliver Polk's peace terms to the Mexican president, Santa Anna. Trist eventually negotiated a settlement on February 2, 1848, that contained nearly everything Polk had hoped for.