Which 1492 event signaled a turning point for the Americans and why?

The discovery of the Americas by Christopher Columbus in 1492 marked a significant turning point for the continent. This event initiated widespread European exploration and colonization, leading to profound cultural, economic, and demographic changes. It ultimately set the stage for the transatlantic exchange of goods, ideas, and people, profoundly impacting the indigenous populations and reshaping the course of American history. The repercussions of this encounter continue to influence the Americas to this day.