Reference
Exactly what Slavs can train, build and research, by age.
Infantry and Siege civilization
•Farmers work +15% faster
•Arson, Gambesons free
•Siege Workshop Units cost -15%
•Monks move +20% faster
Team bonusMilitary buildings (except Castles) provide +5 population space
50 units · 27 buildings · 69 technologies. Each building carries what it trains and researches; upgrades sit under what they upgrade from.