Old Rough and Ready.Sent to the Southwest to command the army at the Texas border, Taylor began (1845) to prepare for hostilities with Mexico regarding the annexation of Texas, pushing into disputed territory S of the Nueces River. In the Mexican War he defeated the Mexicans at Palo Alto and Resaca de la Palma, drove them across the Rio Grande, and took Matamoros. Later he forced the surrender of the Mexican stronghold at Monterrey. In 1847 he won the decisive battle of Buena Vista in the face of great odds. A popular hero, Taylor was nominated for President on the Whig ticket, was elected, and assumed office in 1849. His nonpartisan tendencies were changed under the influence of Senator William H. Seward, and Taylor was soon a strong supporter of Whig policy. As President, he supported the Wilmot Proviso, which excluded slavery from all the territory acquired as a result of the Mexican War. He favored rapid admission of both California and New Mexico to the Union and strict limitation of Texas boundary claims. His free-soil views put him in opposition to the measures that were to become the Compromise of 1850. After charges of corruption were lodged against members of his cabinet, he promised a reorganization, but was stricken with cholera morbus and died on July 9, 1850. He was succeeded by Millard Fillmore.
See biographies by H. Hamilton (2 vol., 1941–51; repr. 2012), B. Dyer (1946, repr. 1967), S. B. McKinley and S. Bent (1946), and K. J. Bauer (1993); E. J. Nichols, Zach Taylor's Little Army (1963).
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