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Legio II Augusta was the legion commanded by Vespasian in Britain. This legion was one of the four legions that invaded Britain in 43 AD under the command of Aulus Plautius. Vespasian served as a military tribune in Legio II Augusta and later became its commander. Under Vespasian's command, Legio II Augusta played a significant role in the Roman conquest of Britain, participating in several key battles and campaigns.