page_title: Gadsden Purchase
section_title: Southern commercial conventions
hierarchical_section_title: Gadsden Purchase / Southern route for the Transcontinental Railroad / Southern commercial conventions
caption_attribution_description: Portrait of James Gadsden, after Charles Fraser (1782-1860)
context_page_description: The Gadsden Purchase, is a 29,670-square-mile region of present-day southern Arizona and southwestern New Mexico that the United States acquired from Mexico by the Treaty of Mesilla, which took effect on June 8, 1854. The purchase included lands south of the Gila River and west of the Rio Grande where the U.S. wanted to build a transcontinental railroad along a deep southern route, which the Southern Pacific Railroad later completed in 1881–1883. The purchase also aimed to resolve other border issues.
  The first draft was signed on December 30, 1853, by James Gadsden, U.S. ambassador to Mexico, and by Antonio López de Santa Anna, president of Mexico. The U.S. Senate voted in favor of ratifying it with amendments on April 25, 1854, and then transmitted it to President Franklin Pierce. Mexico's government and its General Congress or Congress of the Union took final approval action on June 8, 1854, when the treaty took effect. The purchase was the last substantial territorial acquisition in the contiguous United States, and defined the Mexico–United States border. The Arizona cities of Tucson and Yuma are on territory acquired by the U.S. in the Gadsden Purchase.
context_section_description: In January 1845, Asa Whitney of New York state presented the United States Congress with the first plan to construct a transcontinental railroad. Although Congress took no action on his proposal, a commercial convention of 1845 in Memphis took up the issue. Prominent attendees included John C. Calhoun, Clement C. Clay, Sr., John Bell, William Gwin, and Edmund P. Gaines, but it was James Gadsden of South Carolina who was influential in the convention's recommending a southern route for the proposed railroad. The route was to begin in Texas and end in San Diego or Mazatlán. Southerners hoped that such a route would ensure Southern prosperity while opening the "West to southern influence and settlement".
  Southern interest in railroads in general, and the Pacific railroad in particular, accelerated after the conclusion of the Mexican–American War in 1848. During that war, topographical officers William H. Emory and James W. Abert had conducted surveys that demonstrated the feasibility of a railroad's originating in El Paso or western Arkansas and ending in San Diego. J. D. B. DeBow, the editor of DeBow's Review, and Gadsden both publicized within the South the benefits of building this railroad.
  Gadsden had become the president of the South Carolina Canal and Rail Road Company in 1839; about a decade later, the company had laid 136 miles (219 km) of track extending west from Charleston, South Carolina, and was 3 million dollars ($92,000,000 with inflation) in debt. Gadsden wanted to connect all Southern railroads into one sectional network. He was concerned that the increasing railroad construction in the North was shifting trade in lumber, farm and manufacturing goods from the traditional north–south route based on the Ohio and Mississippi rivers to an east–west axis that would bypass the South. He also saw Charleston, his home town, losing its prominence as a seaport. In addition, many Southern business interests feared that a northern transcontinental route would exclude the South from trade with the Orient. Other Southerners argued for diversification from a plantation economy to keep the South independent of northern bankers.
  In October 1849, the southern interests held a convention to discuss railroads in Memphis, in response to a convention in St. Louis earlier that fall which discussed a northern route. The Memphis convention overwhelmingly advocated the construction of a route beginning there, to connect with an El Paso, Texas to San Diego, California line. Disagreement arose only over the issue of financing. The convention president, Matthew Fontaine Maury of Virginia, preferred strict private financing, whereas John Bell and others thought that federal land grants to railroad developers would be necessary.
caption: Lieutenant James Gadsden, U.S. Army, later American ambassador/ minister to Mexico
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