 Complete the following phrase:  In 965 Muslims completed their conquest of Sicily from the Byzantine Empire following the fall of the final significant Greek citadel of Taormina in 962. Seventy three years later, in 1038, Byzantine forces began a reconquest of Sicily under the Byzantine general George Maniakes. This invasion relied on a number of Norse mercenaries, the Varangians, including the future king of Norway Harald Hardrada, as well as on several contingents of Normans. Although Maniakes death in a Byzantine civil war in 1043 cut the invasion short, the Normans followed up on the advances made by the Byzantines and completed the conquest of the island from the Saracens. The Normans had been expanding south, as mercenaries and adventurers, driven by the myth of a happy and sunny island in the Southern Seas. The Norman Robert Guiscard, son of Tancred, 