Nepedia
Back to Discover
Fluent Reader
🏛️

Mexican–American War

history Maturity 11-13 war conflict Next article →

This article covers sensitive topics: war_conflict. Parents can manage visibility in Parental Controls.

The Mexican-American War was a major conflict between two neighbors.

US and mexican soldiers 1846-1848
US and mexican soldiers 1846-1848

It lasted from April 1846 to February 1848. The war started because of a disagreement over land. The United States had recently added Texas to its country.

Wpdms republic of texas
Wpdms republic of texas

However, Mexico still believed Texas belonged to them. This disagreement created a lot of tension between the two nations. The war changed the map of North America forever.

The trouble began with a dispute over a border.

Mexico 1824 (equirectangular projection)
Mexico 1824 (equirectangular projection)

The United States claimed the Rio Grande was the border. Mexico argued the border was actually the Nueces River. President James K. Polk wanted to grow the U.S. even more. He hoped to gain land like California. He even offered $25 million to buy some territory. The Mexican government refused to accept this offer.

In 1846, the fighting officially started after a clash.

Nebel Mexican War 04 Bombardment of Vera Cruz (cropped)
Nebel Mexican War 04 Bombardment of Vera Cruz (cropped)

President Polk sent soldiers into the disputed area. Mexico saw this as an attack and fought back. The U.S. then declared war on Mexico. U.S. forces moved into New Mexico and California.

Kearny-Las-Vegas-Aug-1846-engraving-1882
Kearny-Las-Vegas-Aug-1846-engraving-1882

Later, General Winfield Scott led a large army south. They landed at Veracruz and eventually captured Mexico City in 1847.

Carl Nebel - Genl. Scott's entrance into Mexico, Plate 45
Carl Nebel - Genl. Scott's entrance into Mexico, Plate 45

The war ended with the Treaty of Guadalupe Hidalgo in 1848.

Mexican–American War (without Scott's Campaign)-en
Mexican–American War (without Scott's Campaign)-en

This treaty changed many borders. Mexico gave up a huge amount of its land. This land became parts of California, Nevada, and Utah. It also included parts of Arizona, Colorado, New Mexico, and Wyoming.

Mexican Cession in Mexican View
Mexican Cession in Mexican View

The United States paid $15 million for this land. They also took over some of Mexico's debts. This helped settle the physical damage from the war.

This war had a big impact on the future.

Abraham Lincoln by Nicholas Shepherd, 1846-crop
Abraham Lincoln by Nicholas Shepherd, 1846-crop

It caused fierce debates within the United States. People argued about whether slavery should exist in the new lands. These arguments made the country very divided. Some people even believe this conflict led to the American Civil War. Many officers who fought in this war later became leaders in that later conflict.

Frederick Douglass by Samuel J Miller, 1847-52
Frederick Douglass by Samuel J Miller, 1847-52

The war left a lasting mark on both nations.

335 words

Where will your curiosity go next?

Keep exploring at your chosen reading level.

🖼️ Images & Media (38)
File:Mexico 1832, Region Comanche.PNG
Mexico 1832, Region Comanche.PNG
File:Comanches.jpg
Comanches.jpg
File:Mexico 1824 (equirectangular projection).png
Mexico 1824 (equirectangular projection).png
File:Wpdms republic of texas.svg
Wpdms republic of texas.svg
File:Oleo Antonio Lopez de Santa Anna.PNG
Oleo Antonio Lopez de Santa Anna.PNG
File:Valentín Gómez Farías, portrait.JPG
Valentín Gómez Farías, portrait.JPG
File:US Uniform 1840.jpeg
US Uniform 1840.jpeg
File:María Josefa Zozaya SEPIA.jpg
María Josefa Zozaya SEPIA.jpg
File:The Great Western as Landlady.jpg
The Great Western as Landlady.jpg
File:Heroine of Fort Brown.jpg
Heroine of Fort Brown.jpg
File:Mexican–American War (without Scott's Campaign)-en.svg
Mexican–American War (without Scott's...
File:Abraham Lincoln by Nicholas Shepherd, 1846-crop.jpg
Abraham Lincoln by Nicholas Shepherd,...

+ 26 more

More to explore

What is Nepedia?

A free, ad-free encyclopedia for children. Every article is written at five reading levels, so the same page works for a five-year-old and a fifteen-year-old — use the level switcher above to see this one change. No account needed to read.