In 1846 Zachary Taylor's army marched from Corpus Christi to the Rio Grande, and on March 10, 11, 12, and 13 the four regiments in succession camped at this spot on Santa Gertrudis Creek. War with Mexico over the boundary of Texas began soon, and the first battles, Palo Alto and Resaca de la Palma, occurred near present Brownsville under Mexican commander General Mariano Arista. The war fixed the boundary of Texas at the Rio Grande, and the Treaty of Guadalupe Hidalgo gave the United States New Mexico, Arizona, Nevada, and California. Of the 251 officers camped here, many later rose to national fame, including twelve leaders in the Texas battles whose names were later given to United States forts in Texas: Wm. G. Belknap, Jacob Brown, J.E. Blake, W.W.S. Bliss, Theodore L. Chadbourne, James Duncan, Clinton R. Gates, Zebulon P.M. Inge, George T. Mason, J.B. McIntosh, Samuel Ringgold, and William Jenkins Worth. Many who camped here later became commanders of great armies in the Civil War, among them Angur, Bee, Bragg, Kirby-Smith, Longstreet, Meade, Pemberton, Reynolds, Twiggs, and Whistler, and two of them, Zachary Taylor and Ulysses Simpson Grant, became President of the United States.