BattlefieldsCaesar's Second Invasion — Thames Crossing and Cassivellaunus Stronghold (54 BC)
Roman Period

Caesar's Second Invasion — Thames Crossing and Cassivellaunus Stronghold (54 BC)

-54
Essex, England
Also known as: Caesar second invasion 54 BC · Battle of Cassivellaunus
Era
Roman Period
Battle Type
Pitched Battle
Location
Essex, England
Status
Unregistered
The Combatants

Who Fought

Defeated
Catuvellauni (Cassivellaunus)
Forces
Catuvellauni c. 15,000–20,000
VS
Victor
Romans (Julius Caesar)
Forces
Romans c. 25,000–30,000
Outcome
Caesar crossed the Thames against stakes set in the riverbed; captured Cassivellaunus's stronghold; exacted tribute and hostages before returning to Gaul
The Battle

History & Significance

Caesar's second, much larger expedition penetrated deep into Britain. He defeated the Britons at the Thames crossing despite sharpened stakes in the riverbed, then reduced Cassivellaunus's capital — possibly at Wheathampstead in Hertfordshire. The campaign established Roman prestige and set tribute obligations, but no permanent occupation resulted. Caesar's narrative in De Bello Gallico remains the primary source for pre-Roman Britain.

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