Mehdi-Khan Qasemlu (Persian: مهدی خان) was the first khan (governor) of the Erivan Khanate from 1747 to 1752[1] during the reign of Nader Shah.
[5] After the assassination of Nader Shah on the night of July 19-20, 1747, great confusion arose and claims to the throne began to be made from all sides.
[9] Panah Ali Khan with 4,000 troops crossed the borders of the Erivan Khanate and moved to the lands around Etchmiadzin.
[10] Then the king Teimuraz II of Kakheti moved to Yerevan in September 1749 with a 25,000-strong army, taking advantage of the call of the Armenians.
[11] Taking advantage of the weakening power of the khan of Erivan, Fath-Ali Shah decided to capture Yerevan.