In particular, we're gonna focus on the Inca Empire. And in other videos, we have talked about the Aztecs. But what's interesting is this period of time in the 15th and early 16th centuries when these empires form, but then shortly thereafter, about 100 years after they form, they are conquered by the Spanish conquistadors. So let's focus on the Inca Empire, but keep it in comparison to some of the other significant empires and civilizations we know about. So as we enter into the 15th century, we have the Kingdom of Cusco. What we now call the Inca Empire did not exist yet. The ninth ruler of the Kingdom of Cusco, a gentleman by the name of Pachacuti, he decides to go on a fairly aggressive effort of expansion and it is Pachacuti that takes the Incas from the Kingdom of Cusco and creates an empire.