Cassivelaunus

Cassivelaunus, Cassibelaunus, Cassibelan or Caswallon, the name according to Caesar (Bell. Gal. v. 11, seq.) of the British chief of the Cassi, a tribe settled north of the Thames in and about Hertfordshire, with St. Albans (Verulamium) as their capital. His military capacities caused him to be put at the head of a confederacy of Britons for the purpose of resisting Csesar's invasion in 54 B.C. He seems to have fought with gallantry and skill, but he was no match for Roman discipline, and possibly his nominal allies, the Trinobantes, played him false. Verulamium was stormed, and Cassivelaunus was forced to submit.