Rise of Kings 2: The Imperial Era/Basic units

With the exception of a few factions, the basic units of Rise of Kings 2 always consist of the following:
==Barracks==
Crossbow infantry, spear sergeants, light cavalry (some RoN UUs of the Dark Age appear, and require upgrading to reach them)
==Castle==
Knight, Horse archer, swordsman
==Siege workshop==
Mangonel, Battering Ram, Scorpion