The early Fatimid used Sicily as a base for launching raids against the coastal towns of Italy and France, including the islands of the western Mediterranean; and also continued to be engaged in war and diplomacy with the Byzantines.
The first reported raid against the south of Italian peninsula took place in 306/918. The Fatimid troops captured Reggio. The second incursion was launched from Mahdiya in the summer of 310/922. With a fleet of 20 galleys, the Fatimid officer Masud bin Ghalib al-Wusuli took possession of the fortress of St. Agatha. Two years later, Jafar bin Ubaid, known as Suluk, led the third expedition, with Palermo as his starting point. He captured Bruzzano and Oria and returned to Mahdiya with vast riches. The resounding success of this campaign had the effect of inducing the Byzantines to conclude a treaty with the Fatimids. But the annual tribute agreed for Calabria was slow to reach Mahdiya and hostilities resumed in 315/927. Continuing until 318/930 under the command of Sabir, the Fatimid incursions proceeded victoriously against Tarento, Salerno, Naples and Termoli. Eventually the tribute was paid and the treaty resumed in force until the death of al-Mahdi. According to "The Encyclopaedia of Islam" (Leiden, 1986, 5th vol., p. 1244), "Byzantium allowed the Fatimid sovereign to subjugate Apulia and Calabria and to reinforce the supremacy of Islam in Sicily."