 Complete the following phrase:  In early 1123, the Fatimids launched another attack on Jaffa, an operation which according to Yaacov Lev provides a textbook example of the ineffectiveness of the Fatimid military in this period. A sizeable army was raised and splendidly equipped, and was accompanied by a fleet of 80 vessels, which carried siege equipment and troops. At the same time, another squadron was conducting raids against Christian Shipping. Jaffa was besieged for five days, but then the Crusader army arrived and the siege had to be abandoned. The Fatimid land army was then defeated at the Battle of Yibneh leaving the Fatimid fleet to sail off towards Ascalon. At about the same time, in late May, a large Venetian fleet of 200 vessels 