Why did the Mexican-American War happen?

Answer 1

In part to establish the validity of Texas as a US State since Mexico had never ratified the Treaty of Velasco and it was also used to force Mexico into selling its interest in Alta California and Nuevo Mexico in the quest for Manifest Destiny and US expansionism.

Answer 2

The Mexican War between the United States and Mexico began with a Mexican attack on American troops along the southern border of Texas on Apr. 25, 1846.

By the clash between two patrolling armies called the Thornton Affair.

Answer 3

Mexico had never fully accepted Texas independence.

Answer 4

Because of border disputes, the US Annexation of the Republic of Texas and the Mexican refusal to negotiate the sale to the US of Alta California and Nuevo Mexico.

Answer 5

They wanted CA, NM and recognition of the US and Mexican border as the Rio Grande.

Answer 6

Struggle ont who would control Texas, United States or the Republic of Mexico.

Answer 7

To obtain Independence from Spain.