Civilization in each region developed advance math,science, and engineering.
The citizens of the United States
Answer:
<em>Lincoln means that, since he considered the constitution and the law of United States of America to be superior above any state, then, to his ability, he would defend the constitution upon which the country is binded (that is, unify the States together).</em>
<em>This is to ensure that America was never disintegrated into smaller countries.</em>
Explanation:
I don’t know if this will help you But here is what I got about the Mexican American War.
The Mexican-American War (1846-1848) marked the first U.S. armed conflict chiefly fought on foreign soil. It pitted a politically divided and militarily unprepared Mexico against the expansionist-minded administration of U.S. President James K. Polk, who believed the United States had a “manifest destiny” to spread across the continent to the Pacific Ocean. A border skirmish along the Rio Grande started off the fighting and was followed by a series of U.S. victories. When the dust cleared, Mexico had lost about one-third of its territory, including nearly all of present-day California, Utah, Nevada, Arizona and New Mexico.
It was provoked by a tax on whisky, and was the first serious challenge to federal authority. Collection of the tax met violent resistance, but when President Washington called out the militia, the rebellion collapsed.
