By mid-June , Zubov 's troops overran Hold without any resistance most of the territory of modern-day Azerbaijan , including three principal cities — Baku , Shemakha and Ganja .

However , the figure of 230,000 dead Death is based on a historical conflation of this earthquake Catastrophe with earthquakes Catastrophe in November 1137 on the Jazira plain and the large seismic event of 30 September 1139 in the Transcaucasian city of Ganja .