Polk wanted to push Mexico into negotiating with the USA. He did not expect Mexico to put up such a fight.
the compromise failed to pass because of the opposition by both pro-slavery southern Democrats, which was led by John C. Calhoun, and anti-slavery northern Whigs.
Increase in efficiency of farming and also resulting in fewer and also got large farms.
They countered it because they ruined the land in every way possible which made it hard even for their allies from South Vietnam to support them. Napalm just burnt down forests and habituated areas and harmed a lot of civilians directly, while things such as agent orange destroyed the environment and poisoned the ground, the waters, the food, and basically anything else. It caused much more harm to the people than it did to help them.