What Was the Mexican-American War History Channel?

The Mexican-American War, also known as the Mexican War, was a conflict that took place between 1846 and 1848. It was fought between the United States and Mexico over territorial disputes in Texas and California. The war had significant consequences for both countries, marking a turning point in their histories.

Background of the War

The roots of the Mexican-American War can be traced back to Texas’ annexation by the United States in 1845. Mexico had never recognized Texas’s independence from them in 1836, and they saw annexation as an act of aggression.

Additionally, there were disputes over the border between Texas and Mexico. The U.S. claimed that the border was the Rio Grande, while Mexico insisted that it was further north along the Nueces River.

Causes of the War

The causes of the Mexican-American War were complex and multifaceted. Some historians argue that it was primarily driven by America’s desire for territorial expansion into California, while others suggest that it was a result of long-standing tensions between the two countries.

One major cause was economic interests. Many Americans believed that acquiring new territories would bring more wealth and resources to their country. There was also a strong sense of Manifest Destiny – a belief among many Americans that it was their destiny to expand westward across North America.

The Course of the War

The Mexican-American War began on April 25th, 1846 when American troops under General Zachary Taylor clashed with Mexican forces near the Rio Grande. The fighting continued for two years until September 1848 when both sides agreed to sign the Treaty of Guadalupe Hidalgo.

Throughout these years, there were several significant battles fought on both sides. Some notable ones include:

  • The Battle of Buena Vista (February 23-24, 1847)
  • The Battle of Cerro Gordo (April 17-18, 1847)
  • The Battle of Chapultepec (September 12-13, 1847)

Consequences of the War

The Mexican-American War had significant consequences for both countries. For Mexico, it was a devastating defeat that resulted in the loss of over half its territory to the United States. The Treaty of Guadalupe Hidalgo gave Texas, California, Nevada, Utah, Arizona, New Mexico, Colorado, Wyoming, Kansas, and Oklahoma to the United States.

For the United States, it marked a significant territorial expansion and cemented its position as a dominant power in North America. However, it also heightened tensions between North and South over the issue of slavery and raised questions about America’s relationship with its southern neighbor.


In conclusion, the Mexican-American War was a pivotal moment in American and Mexican history. It was driven by complex factors such as economic interests and Manifest Destiny.

The course of the war saw several significant battles fought on both sides before ending with Mexico’s defeat. The consequences were far-reaching and had lasting impacts on both countries’ social-political landscape for generations to come.