BattlefieldsSiege of Rochester Castle (First Barons' War — 1215)
Medieval

Siege of Rochester Castle (First Barons' War — 1215)

1215
Kent, England
Also known as: Rochester castle siege 1215 · John besieges Rochester
Era
Medieval
Battle Type
Siege
Location
Kent, England
Status
Unregistered
The Combatants

Who Fought

Defeated
Barons (rebel garrison)
Forces
Baron garrison c.500–1,200.
VS
Victor
Royalists (King John)
Forces
King John c.2,500–5,000
Outcome
Castle taken after seven-week siege; John undermined south tower by burning pig fat
The Battle

History & Significance

The Siege of Rochester Castle in 1215 was one of the defining military episodes of King John's reign. A rebel baron garrison held Rochester against John's royal army for seven weeks — an extraordinary resistance. John's engineers undermined the south tower using the fat from forty pigs to fuel the fire; the tower collapsed. The tenacity of both sides showed how serious the baronial revolt against John had become, just months after Magna Carta.

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