Reference
Exactly what Incas can train, build and research, by age.
Infantry civilization
•Houses and Settlements provide +5 population space
•Buildings cost -15% stone
•Military Units cost -15/20/25/30% food in Dark/Feudal/Castle/Imperial Age
•Villagers affected by Infantry Blacksmith upgrades starting in Castle Age
Team bonusStart with a free Llama
43 units · 25 buildings · 70 technologies. Each building carries what it trains and researches; upgrades sit under what they upgrade from.