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Siege

A siege is a prolonged military assault and blockade[?] on a city or fortress[?] with the intent of conquering by force or attrition[?]. Sieges usually involve surrounding the target and blocking the provision of supplies.

Defenses:

Bunker
Castle
City wall
Trench

Siege weapons:

Ballista
Catapult
- Torsion catapult[?]
- Trebuchet
Onager
Siege tower
Mortar
Cannon

Other:

Biological warfare
Infiltration
Mole[?]
Sapping
Starvation

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