Cassi
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The Cassi were a tribe of Iron Age Britain encountered by Julius Caesar during his second expedition to Britain in 55 BC.[1] They surrendered to him as he was campaigning against Cassivellaunus in the Thames Valley, which suggests they were also based in the south-east. It has been speculated that the British leader Cassivellaunus belonged to them, rather than, as is usually supposed, the Catuvellauni.[2]