On 22 July 1139, at Galluccio, Roger II's son Roger III of Apulia ambushed the papal troops with a thousand knights and captured Innocent. On 25 July 1139, Innocent was forced to acknowledge the kingship and possessions of Roger with the Treaty of Mignano. In 1143, Innocent refused to recognise the Treaty of Mignano with Roger of Sicily, who sent Robert of Selby to march on papal Benevento. The terms agreed upon at Mignano were then recognised. Innocent II died on 24 September 1143 and was succeeded by Pope Celestine II.