During Julius Caesar's second invasion of Britain in 54 BCE, following Caesar's military success and restoration of King Mandubracius to power over the Trinovantes, opposition to the Romans coalesced around the figure of Cassivellaunus which led to divided loyalties among the Britons, as Caesar records. Emissaries of five British tribes, including the Cenimagni (the others being the Ancalites, the Segontiaci, the Bibroci and the Cassi), arrived at the Roman camp to treat for peace, and agreed to reveal details of Cassivellaunus' stronghold.
During Julius Caesar's second invasion of Britain in 54 BCE, following his military success and restoration of King Mandubracius to power over the Trinovantes, opposition to the Romans centered around Cassivellaunus. This division among Britons was recorded by Caesar. Representatives from five British tribes, including the Cenimagni (the others being the Ancalites, the Segontiaci, the Bibroci and the Cassi), met at the Roman camp to negotiate peace terms, agreeing to reveal details of Cassivellaunus' stronghold.