Which event in your history's country has been the most important? why? and its consequences?

Answer 1

USA - Columbus' arrival in North America. It affected every part of history in the US thereafter. And it had immediate consequences such as the Genocide and Torture of many Native tribes.

Answer 2

USA - Lincoln's Gettysburg address, and the Civil War. The united states was about to split apart, and in effect it did. Lincoln ended slavery, and directly into a conflict between the North and the South that killed more Americans than every war since then combined. The country was brought back together, reconstructed, and became prosperous.