Consider the annexation of Texas and the Mexican-American War from a Mexican perspective. What would you find objectionable about American actions, foreign policy, and attitudes in the 1840s?

In a Mexican perspective, the Mexican-American War is called American invasion because Mexico considered the annexation of Texas a violation of the 1828 border treaty that acknowledged Mexico's sovereignty over the territory.

The US policy did not accept negotiations and demanded the cession of the territories, which is very objectionable which left the Mexican government without choice, they had to have friendly relations or resort to war. Mexico never declared war against the US it simply defended it's territory's integrity.

All of this demonstrates how the US policy was forcing Mexico to go to war for simply defending its territory against an invasion.