Georgia invaded and conquered the city of Tabriz .
At the peak of its military might , Georgia , under Tamar the Great invaded and conquered the city of Tabriz , Ardabil , Khoy , Qazvin and others along the way to Gorgan in northeast Persia ( modern-day Iran-Turkmenistan border ) , as a retribution for the attack on Georgian-controlled city of Ani , where 12,000 Christians were massacred in 1208.In spite of repeated incidents of dynastic strife , the kingdom continued to prosper during the reigns of Demetrios I ( 1125–1156 ) , George III ( 1156–1184 ) , and especially , his daughter Tamar ( 1184–1213 ) .
Kingdom of Georgia