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Why was the Mexican-American War important? From 1846 to 1848, the United States of America and Mexico went to war. There were several reasons why they did so, but the most important ones were the US annexation of Texas and the Americans' desire for California and other Mexicanterritories

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What were the causes of the Mexican-American War? Causes of the Mexican-American War. Texas gained its independence from Mexico in 1836. Initially, the United States declined to incorporate it into the union, largely because northern political interests were against the addition of a new slave state

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The Treaty of Guadalupe Hidalgo (Tratado de Guadalupe Hidalgo in Spanish), officially entitled the Treaty of Peace, Friendship, Limits and Settlement between the United States of America and the Mexican Republic, is the peace treaty signed on February 2, 1848, in the Villa de Guadalupe Hidalgo

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The Mexican Cession of 1848 is a historical name in the United States for the region of the modern day southwestern United States that Mexico ceded to the U.S. in the Treaty of Guadalupe Hidalgo in 1848.

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The Gadsden Purchase is a 29,670-square-mile region of present-day southern Arizona and southwestern New Mexico that the United States purchased via a treaty signed on December 30, 1853, by James Gadsden, U.S. ambassador to Mexico at that time.

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The Battle of Veracruz was a 20-day siege of the key Mexican beachhead seaport of Veracruz, during the Mexican-American War

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The Nueces River is a river in the U.S. state of Texas, about 315 miles long. It drains a region in central and southern Texas southeastward into the Gulf of Mexico. It is the southernmost major river in Texas northeast of the Rio Grande.

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The Rio Grande is one of the principal rivers in the southwest United States and northern Mexico. The Rio Grande begins in south-central Colorado in the United States and flows to the Gulf of Mexico.

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Winfield Scott was a United States Army general and unsuccessful presidential candidate of the Whig Party in 1852.

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Zachary Taylor was the 12th President of the United States, serving from March 1849 until his death in July 1850. Before his presidency, Taylor was a career officer in the United States Army, rising to the rank of major general.

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James Knox Polk was the 11th President of the United States. Polk was born in Mecklenburg County, North Carolina, and moved to Tennessee to study law.

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the 19th-century doctrine or belief that the expansion of the US throughout the American continents was both justified and inevitable.