Work in Progress: The Knights Templar and House of Lancaster civilizations aren't fully updated and miss stats, abilities and upgrades.
Explorer will continue to be updated over the next few weeks for both old and new civs.
Siege Unit Unlock

Siege Engineering (Improved)

Mongols
Melee and ranged infantry can construct Siege Towers and Battering Rams in the field. Improved Siege Engineering allows for the construction of Mangonels, Springalds and Trebuchets as well.
Available in the Feudal Age (II)

Researched at

Costs
50
125
175
0:30

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