Abbas I's Shirvan campaign took place in 1606–1607, during the Ottoman-Safavid War of 1603–1618. The Safavids had lost control over the province by the Treaty of Constantinople of 1590. In the winter of 1606, Safavid king (shah) Abbas I (r. 1588–1629), invaded Shirvan.[1] Derbent and Baku soon fell as a result of pro-Safavid uprisings and in the spring of 1607 Abbas I and his men successfully besieged Shamakhi, the provincial capital of Shirvan.[2] With the reconquest of Shirvan, the Safavids had recovered all territories lost to the Ottomans in 1590.[2][3] (see Treaty of Nasuh Pasha)