It would be "Tikal" that is the largest Mayan ruin and contains one of the tallest structures in Pre-Columbian America, although it's the actual temples within Tikal that count.
The South relied heavily on steamboats for transportation of supplies and troops. They absolutely needed the Mississippi River to be effective in anyway during the war. The North also used it for transporting, but they had railroads. They were mostly concerned with keeping the South from using it.
Answer:
They rose by using threats and force against the people. It also impacted people in a negative way because the value of life wasn't satisfying
they told them that they could carry them out
