The Mexican-American War (1846-1848) was the result of disputed land claims between the United States and Mexico. Mexico claimed most of what is now the southwest US, based on the claims by the Spanish from whom they achieved independence in 1810. The United States, anxious to claim California and the rest of the West, annexed Texas and sent troops to enforce the disputed border. When US troops were engaged by Mexican forces, war was declared.
(see related question)
jumping the border
Expansionism and Manifest Destiny were root causes of the Mexican American War.
The Mexican cession was the outcome of the Mexican American war.
The Mexican-American War was not unnecessary.
In fact, the Mexican-American War (1846-1848) was one of the reasons to the American Civil War (1861-1865)
The Mexican-American War began
No, the Mexican American War began in 1846.
Nueces River. This is one of the "official" reasons for the Mexican-American War.
JFK fought in the Mexican American war
No the Mexican American War was from 1846 to 1848.
The US won the Mexican American War against Mexico.
Yes, he succeed the Mexican American war.
The mexican-american war