After the bloody fight on the Sambre (57 BCE) Julius Caesar sent Publius Licinius Crassus with a single legion into the country of the Veneti, Redones, and other Celtic tribes between the Seine River and the Loire, all of whom submitted.
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D'Anville supposes that their territory extended beyond the limits of the diocese of Rennes into the dioceses of St. Malo and Dol-de-Bretagne.
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In 52 BCE the Redones with their neighbors sent a contingent to attack Caesar during the siege of Alesia.