All non-mercenary units require population of their respective classes to recruit.
Population: Cities now have population, which directly affects their squalor levels and economy.
Dynamic Faction Ranks: Any faction in the campaign can grow from a county to an empire.
Decisions: Enact decisions that can affect your ruler or your realm.
Crusades (Currently only the 5th Crusade): Travel far from your homeland to retake the Holy Land, in service of God or perhaps in search of glory and power.
Buffer States: Release vassal buffer states from conquered territories where your direct control may be tenuous.
Annex Vassals: Diplomatically annex vassals who have been subjugated for 10 or more turns.
Optional UI sound effect replacement mod.
Over 4,000 beautifully modeled and period-accurate units (Note that only Tier 1 units are available until the remaining technologies are implemented).
Single region provinces, where every region on the map has 6 slots.