Reference
Exactly what Vikings can train, build and research, by age.
Infantry and Naval civilization
•Wheelbarrow, Hand Cart free
•Infantry +20% HP starting in Feudal Age
•Warships cost -10/15/20% in Feudal/Castle/Imperial Age
Team bonusDocks cost -15%
47 units · 27 buildings · 69 technologies. Each building carries what it trains and researches; upgrades sit under what they upgrade from.