1. Introduction The Inca’s are have the greatest achievements out of the Maya, Aztecs and Inca. The Inca’s greatest achievement is being able to control their large empire that was 2,500 miles of mostly steep mountains and their empire had 10,000,0 people. Also the Inca were able to farm the mountains using terraces along the mountain side. Although the Aztecs built an amazing capital city on an island the Incas architecture was mainly just stones stacked but they made it so perfect in no place could a knife blade them. The Inca were very advanced in healing for their time and were the first or one of the first peoples to do brain surgery, their brain surgery was called trephination.

2. The Incas greatest achievement was being able to control their large empire that stretched 2,500 miles with around 10,000,000. Evidence of that is their complex road system. Their road system aloud messengers to run through the mountains very easily and so the messengers did not get tired they did a relay so then the message got there faster and the messengers did not tire. Another example of the Inca controlling their large empire was, when a village or city was right outside their boarders they would ask them to join their empire. This way if someone was attacking them the main part of the Inca empire would know before they were near and they had time to get ready.

3. One achievement the really helped the Inca survive was because they figured out how farm on the steep0 mountains using terraces. What they did was build about three foot terraces usind stone slabs.