The United States was justified in going to war because Mexico had exfoliate American blood on American soil, Texas (a land that numerous Mexicans still considered theirs) was an independent democracy and had the right to govern itself, and Texas was trying to come part of the United States, which means that the United States.
During 1846-1848, Mexico and the United States were mooting over whether Texas and California was Mexico's home or America's home.. The United States was unjustified in going into war with Mexico because President JamesK. Polk provoked it, the thievery of land, and the slavery expansion.
