How did Mexico react when the US annexed?

Answer 1

In the Venacular it might be something like: Its not over till the Fat Lady Sings. The Mexican-American War followed in which the US trounced Mexico and took from it vast lands like California, New Mexico and Arizona. It was an act of Empireunlike anything else in American History.

Answer 2

Mexico severed diplomatic ties with the U.S. as it had already warned that any annexation attempt would mean war.

You should note however, that Polk already planned for all of this: he took advantage of the ill-defined border between Mexico and Texas as pretext to start the Mexican-American War (1846-1848) with the aim of taking California and its riches away from Mexico.

Answer 3

It prompted a break in diplomatic relations with the United States, as Mexico had warned the US any annexation attempt would result in war. Both Mexico and the United States increased their military presence on the Mexico-Texas border, which at the time was ill-defined. Shots between both armies on this no-man's-land resulted on American deaths, eventually prompting president Jackson to declare war against Mexico.

In general terms, it is a still-existing wound for many Mexicans even today.

Answer 4

It led to war with the United States.