Why is chapter 2 titled "1493"?

The title 1493 brings us away from our preconcieved notions about Columbus and his "discovery" of America. What most people know is that Columbus dicovered the New World in 1492, but that is where the story ends for most people. 1493 discusses what Columbus did to the New World after he discovered it. Most textbooks don't mention what Columbus did in the New World other than bring back riches. In 1493 we see that Columbus began a slave trade and conquered the natives treating them horribly. This knowledge heavily contradicts the common portrayal of the Great Columbus.