Seljuk Setback in Eastern Anatolia

Timeline

1. 1121Mesopotamia–Lake Van direction · Eastern AnatoliaSeljuk sultan Mahmud II assembled a large army from Iraq intending to suppress revolts along the southern Caucasus and check Georgian expansion. Eastern emirs of the Sultanate of Rum were also called up, but divergent interests among Turkic factions weakened coalition cohesion.
2. 1121Field of Didgori · GeorgiaThe main eastern campaign force was routed by Georgian forces at Didgori, and the Seljuks lost effective control of the Kartli region. The defeat shook eastern Anatolia, and local Turkic chieftains began reassessing their loyalty to the central sultan.
3. 1121–1122Eastern Anatolian frontier · AnatoliaSeljuk eastern garrisons withdrew, leaving the Lake Van–Erzurum line thinly defended. The Byzantine Empire simultaneously increased pressure on Anatolia's western coast. After Georgia recovered Tbilisi in 1122, the Seljuk strategic position in the east further deteriorated.