Some people disagree with using agent orange during the Vietnam war because the agent was dangerous and had adverse effects on both the enemy and the American troops. Agent orange was a powerful chemical used for defoliation during the Vietnam war to eliminate forest cover. It was later discovered that the chemical caused serious health issues for the service men, their families as well as the enemy. Health issues experienced include: birth defects, tumors, rashes, cancer, etc.
The major significance of the 1876 election is that "The results marked the end of Reconstruction", which has historically been seen as a bad thing since it allowed Jim Crow laws to flourish in the South.