Which river did Mexico plan to establish as the boundary?

Mexico’s boundary plan

Mexico, once a vast empire, became a sovereign nation in 1821. After gaining independence from Spain, Mexico focused on expanding its territory. However, in the mid-19th century, Mexico faced significant political and economic turmoil followed by a military defeat by the United States. As a result, Mexico had to cede a significant portion of its territory to the US, including present-day California, Arizona, New Mexico, Nevada, Utah, and parts of Colorado, Wyoming, Kansas, and Oklahoma.

The Treaty of Guadalupe Hidalgo

The Treaty of Guadalupe Hidalgo, signed on February 2, 1848, between Mexico and the United States, ended the Mexican-American War. The treaty recognized Texas as a part of the US and established the present-day border between Mexico and the US. The treaty also obligated the US to pay Mexico $15 million in compensation for the lost territories. Article V of the treaty specified that the boundary between the two nations would follow a river.

Article V: Establishing a river boundary

Article V of the Treaty of Guadalupe Hidalgo stated that the boundary between the US and Mexico would follow "the deepest channel of the Rio Grande from its mouth to the point where the 100th meridian of longitude crosses the same, thence up the middle of that river." However, both Mexico and the US had a somewhat different interpretation of the river that would serve as the boundary. Mexico believed it was the Rio Bravo, while the US referred to it as the Rio Grande.

The Rio Grande or Rio Bravo?

The Rio Grande/Rio Bravo is the fourth-longest river system in North America, originating in the Rocky Mountains in Colorado and flowing through New Mexico and Texas before emptying in the Gulf of Mexico. Mexico referred to it as the Rio Bravo, while the US used the name Rio Grande. The confusion arose because the river had different names in different regions.

Historical background of the boundary dispute

The boundary dispute between Mexico and the US over the Rio Grande/Rio Bravo dates back to the 1820s. The disagreement arose because of the River’s changing course over time, which made it difficult to ascertain its true boundary. Moreover, the territorial claims of the two nations were not clear, leading to many misunderstandings.

Diplomatic negotiations between Mexico and the US

After the Treaty of Guadalupe Hidalgo, Mexico and the US held several diplomatic negotiations to determine the exact boundary. Finally, in 1852, a treaty was signed, known as the Treaty of Mesilla or the Gadsden Purchase, which resolved the boundary dispute in favor of the US. The treaty recognized the Rio Grande as the boundary between the two nations from El Paso to its mouth.

The Gadsden Purchase and its impact

The Gadsden Purchase, named after James Gadsden, the US Ambassador to Mexico, was signed on December 30, 1853, between Mexico and the US. The treaty allowed the US to purchase about 45,000 square miles of land in present-day southern Arizona and New Mexico for $10 million. The purchase aimed to secure a route for a southern transcontinental railroad and to resolve the boundary dispute.

Finalizing the river boundary in 1853

The Treaty of Mesilla or the Gadsden Purchase of 1853 finalized the Rio Grande as the boundary between Mexico and the US from El Paso to its mouth in the Gulf of Mexico. The treaty also provided for the US to pay Mexico $10 million, which helped Mexico pay off its debt to European creditors.

Challenges and controversies surrounding the agreement

The Treaty of Mesilla or the Gadsden Purchase of 1853 was not without challenges and controversies. Mexico’s decision to sell the land was met with criticism and protests from its citizens. Moreover, the US government’s expansionist policy and its aggressive stance towards Mexico were also widely criticized.

The river boundary today

Today, the Rio Grande serves as the boundary between Mexico and the US across Texas and New Mexico, and parts of Colorado and Wyoming. The boundary is marked by a series of monuments and fences.

Conclusion: Mexico-US border relations

The boundary dispute between Mexico and the US over the Rio Grande/Rio Bravo was a significant moment in the history of the two nations. While the dispute was resolved through diplomatic negotiations, it left a lasting impact on the relations between the two nations. Today, the boundary between Mexico and the US continues to be a point of contention, with issues such as immigration, trade, and security at the center of the debate.