 Most of the Roman ships returned to Sicily, leaving Regulus with 15,000 infantry and 500 cavalry to continue the war in Africa; Regulus laid siege to the city of Adys.The Carthaginians had recalled Hamilcar from Sicily with 5,000 infantry and 500 cavalry.Hamilcar, Hasdrubal and Bostar were placed in joint command of an army which was strong in cavalry and elephants and was approximately the same size as the Roman force.