The Incas first started in Cuzco and grew land there. The Incas then became great warriors and started to conquer other kingdoms and became even more powerful and grew even bigger growing through the land. The Incas first started conquering tribes because there kingdom next to them tried to conquer the Incas but the Incas conquered the Chankas before they can conquer the Incas.The Incan capital was also very close to Lake Titicaca. Machu Picchu was also close to the lake. In present day the Incas conquered parts of Ecuador,Colombia,Peru,Chile,Argentina,and Bolivia. The Incas had an empire as long as the United States is wide.