The sack of Shamakhi took place on 18 August 1721, when rebellious Sunni Lezgins, within the declining Safavid Empire, attacked the capital of Shirvan province, Shamakhi (in present-day Azerbaijan Republic).[1][2] The initially successful counter-campaign was abandoned by the central government at a critical moment and with the threat then left unchecked, Shamakhi was taken by 15,000 Lezgin tribesmen, its Shia population massacred, and the city ransacked.
The deaths of Russian merchants within Shamakhi were subsequently used as a casus belli for the Russo-Persian War of 1722–1723, leading to the cessation of trade between Iran and Russia and the designation of Astrakhan as the new terminus on the Volga trade route.