Completed the following sentence: On other occasions, vexillations were sent abroad. It is possible that one of them was sent to Tongeren in Gallia Belgica during the reign of Caligula, which may have been part of the army he wanted to use to invade Britain in 40 AD. Another vexillatio took part Domitius Corbulo's campaign against the Parthian Empire in 63 AD. <unk> <unk> <unk> <unk>
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