The Battle of Olivento was fought on 17 March 1041 between the Byzantine Empire and the Normans of southern Italy and their Lombard allies near the Olivento river, in Apulia, southern Italy. The battle of Olivento was the first of the numerous successes scored by the Normans in their conquest of southern Italy. After the battle, they conquered Ascoli, Venosa, Gravina di Puglia. It was followed by other Normans victories over the Byzantines in the battles of Montemaggiore and Montepeloso.