400
15030sPowerful siege engine effective at destroying buildings and walls over a great distance.
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Blacksmith
Military Academy: Increase the production speed of infantry, cavalry, siege, and transport units at buildings by 33%. Does not affect religious units or other support units.
Siege Workshop
Greased Axles: Increase the movement speed of siege engines by +15%.
Geometry: Increase damage of Trebuchets by +20%.
University
Siege Works: New carpentry techniques increase the health of siege units by +20%.
