1492 was the year of Discovery of America by Columbus!
This meant that the history of the world, which so far was separate (the one we know, from the Old World, but there was also the history of cultures and civilisations of the New World) was joined: the civilisations clashed and the globalisation begun. It was also the beginning of the end of many American Cultures and languages...but also a beginning for many nations, such as the US and for example, Mexico