 Complete the following phrase:  Zengi, the atabeg of Aleppo and Mosul, attacked Damascus in 1135 and again in 1140. Zengis second attack was thwarted because Damascus forged a coalition with the Crusader states to the south, arguing that if Damascus were conquered, these states would fall as well. Crusader armies attacked Damascus a third time in 1148 during the Second Crusade. This 