NO LINKS OR ELSE YOU'LL BE REPORTED!Only answer if you're very good at History. Explain why the mobilization of the US army that was an outright attack on Mexico important to know in the Mexican American war.​

The Mexican American war was stemmed from the annexation of the Republic of Texas by the U.S. in 1845 and from a dispute over whether Texas ended at the Nueces River.

That is all the info I can give you maybe rephrase the question differently or something

a.

congress passed laws allowing for free passage between states.

the answer to this question is the third option. hope this