The history of the Fatimid navy follows that of the Fatimid Caliphate itself, and can be roughly divided into two distinctive periods: the first in 909–969, when the dynasty assumed control over Ifriqiya (modern Tunisia) and fought in the Maghreb and Sicily, and the second in 969–1171, after its conquest of Egypt, followed by Palestine, much of Syria and the Hejaz. The latter period can again be divided in two sub-periods, with the arrival of the First Crusade in 1099 as the turning point.[15][16]