chiefdom · British Isles

Cassi

54 BCE – 54 BCE (approx.)

British people named only by Julius Caesar in 54 BCE, sometimes linked by name with Cassivellaunus, leader of resistance to Rome.

Origins

The Cassi are recorded once in Caesar's Gallic War as one of five British peoples, with the Cenimagni, Segontiaci, Ancalites and Bibroci, who sent envoys to surrender during his second invasion in 54 BCE.

Rule and society

Nothing is known of their rulers or society. Because their name resembles that of Cassivellaunus, some historians suggest they were his own people or a group within his following north of the Thames, perhaps in Hertfordshire, but there is no firm evidence.

Decline and legacy

They do not appear again in any source. Their territory, wherever it lay, was absorbed into larger polities such as the Catuvellauni before the Roman conquest of 43.

Few sources survive for this state; details are uncertain.

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Cite this page
APA
The Epoch Institute. (2026). Cassi. In The Epoch Institute States Register. https://the-epoch-institute.org/state/cassi
MLA
“Cassi.” The Epoch Institute States Register, The Epoch Institute, 2026, https://the-epoch-institute.org/state/cassi. Accessed .
Chicago
The Epoch Institute. “Cassi.” The Epoch Institute States Register. 2026. https://the-epoch-institute.org/state/cassi.
Harvard
The Epoch Institute (2026) ‘Cassi’, The Epoch Institute States Register. Available at: https://the-epoch-institute.org/state/cassi (Accessed: ).

Last reviewed October 2026Random state ↻