 In 950, Hassan waged war against the Byzantines in southern Italy, reaching up to Gerace and Cassano allo Ionio.A second Calabrian campaign in 952 resulted in the defeat of the Byzantine army; Gerace was again besieged, but in the end Emperor Constantine VII was forced to accept having the Calabrian cities pay a tribute to Sicily.In 956, the Byzantines reconquered Reggio and invaded Sicily; a truce was signed in 960.