The Age of Exploration is inextricably tied to colonialism, as each "new" territory was quickly absorbed into the several European powers of the time. Spain was among the first to take advantage of this and, in the early 16th Century, toppled the Aztec Empire to gain control of Mexico. But what led up to this conflict? Who were the Aztec? And how did they build such a mighty empire in just two centuries? Tune in to this week's episode to find out.