Battering Ram Slow, lumbering; reduces enemy towns to ruins. Built at Siege Workshop Strong vs. archers, cavalry archers Weak vs. Barracks units, Stable units Upgrades: Attack: Siege Engineers (University)	Mangonel Wheeled siege weapon used to attack a small mass of units. Area of effect attack. Can attack ground. Built at Siege Workshop. Strong vs. Archery Range units, Barracks units Weak vs. Mangudai, Stable units; nearby units Upgrades: Range: Siege Engineers (University) Attack: Siege Engineers (University) ; Chemistry (University)
Scorpion Fires large arrow-like bolts. Effective vs. large masses of units; shots hit multiple units causing damage to all units they touch. Strong vs. Barracks units, archers, Monks Weak vs. Stable units, Woad Raiders Upgrades: Attack, Range: Fletching, Bodkin Arrow, Bracer (Blacksmith); Siege Engineers (University) Tracking: Ballistics (University) Attack: Chemistry (University)	Petard Demolition infantry unit armed with explosives. Devastating to buildings; ineffective against other units. Created at Castle Strong vs. buildings, walls, siege weapons Weak vs. archers, scorpions, cavalry archers, mangonels Upgrades: Attack:  Siege Engineers (University) Unit Creation Speed:  Conscription (Castle) Units Resist Enemy Monks, Missionaries:   Faith, Heresy (Monastery)