<span>Prior to the Mexican American war president Polk sent John Slidell to Mexico to negotiate an agreement between that the Rio Grande River would be the southern border of Texas. ... The United States annexed the territory of California in 1848 following its victory in the Mexican-American War.</span>
The answer is D) destroy the South's strategic and economic capacity to fight.
Why is it D)? Well its D) because the main purpose of General Sherman's "March to the Sea" in 1864 was to destroy the South's strategic and economic capacity to fight.. They crushed Georgia's- and the South's- will to fight by waging "total war."
I do not think so.
In my opinion, the foreign policy of the current US government has diminished the country's relative importance to the world. The United States has always been considered the country of freedom and the American dream. However, the sense of freedom has diminished before the preaching of nationalism. Anyway, I believe it is possible that the US will once again be the best country in the world. Governments and their policies are transient, we have a solid democracy and our culture is still hegemonic.