Gilan

Gilan is a mountainous region of Northwestern Persia. Due to its mountainous nature shared with neighboring Tabarestan it was often hard to control by the Kings of Persia.

History
In the Battle of Jalula the locals of Gilan were defeated by an Arab army, but the victory seem to be Pyrrhic as the region went unconquered. In 1307 the region was finally conquered by the Mongols, but around 1336 it once again was free of foreign rule. In 1534 and 1591 the Ottomans temporary wrestled control of the region. With 1592 bringing direct Safavid rule in the region. Russia informal ruled Gilan from December 1722 to June 1732 and formally from September 12th 1723 to February 1st 1732. This also applied to Mazandaran and Astarabad until 1729 when the Safavid regained controlled of them. During the Revolutions of 1917 - 1923 the region was captured by Soviets and declared the Persian Socialist Soviet Republic, but with hindsight it's normally called the Gilan Soviet Republic as that was the only region it controlled. It was guided by men from the Jungle Movement that had been working against the Safavids since World War 1 started.