The Siege of Akhulgo took place in June–August 1839 during the Caucasian War between the Russian Empire and the Caucasian Imamate led by Shamil. General Pavel Grabbe besieged Imam Shamil in the rock-fortress of Akhulgo. Wikipedia
Dates: Jun 12, 1839 – Aug 22, 1839
Location: Republic of Dagestan