There was a lot of patriotism after 1812. It was essentially the second revolutionary war.
The US actually gained territory in the south (West Florida from Spanish).
Manufacturing grew during this time to supply the war effort.
A ton of natives were killed during the war (10000 according to wikipedia), so there was a lot less resistance from the natives.
The correct answers are 1, 2, and 4.
The <span>presidential power of veto allows the President to reject new legislation passed by the Legislature--meaning that the bill has to then be passed by a 2/3 majority in order to become a law. </span>
The Mexican-American war came from America taking Texas. Then that allowed us to receive even more land, more than 500,000.