After pillaging the County of Edessa, Ilghazi made peace with the crusaders. In 1121, he went north towards Armenia and with an estimated 15.000-20.000 troops, including men led by his son-in-law Mazyad Dubais II ibn Sadaqah and Sultan Malik of Ganja. Ilghazi invaded Georgia and was defeated by David IV of Georgia at the Battle of Didgori of 1121. Ilghazi died in 1122, and although his nephew Belek Ghazi nominally controlled Aleppo, the city was really controlled by ibn al-Khashshab. Ibn al-Kashshab was murdered by Assassins in 1125, and Aleppo fell under the control of Zengi, atabeg of Mosul, in 1128. After the death of Belek Ghazi, the Artuqids were split between Harput, Hasankeyf and Mardin. Sokman's son Rukn al-Daula Dāʾūd, bey of Hasankeyf, died in 1144, and was succeeded by his son Kara Aslan. Kara Aslan allied with Joscelin II of Edessa against the Zengids, and while Joscelin was away in 1144, Zengi recaptured Edessa, the first of the Crusader states to fall (see Siege of Edessa). Hasankeyf became a vassal of Zengi as well.