How was Persia divided in 1907?

The Anglo-Russian Entente of 1907. Consequently, in 1907, Britain and Russia signed an agreement to regulate their economic and political interests. With respect to Iran, the Anglo–Russian Agreement recognized the country's strict independence and integrity, but then divided it into three separate zones.

The agreement divided Persia into three zones. A large Russian zone to the north and two smaller zones. One which neither country dominated, and a British zone to the south. The agreement over Afghanistan was a concession by Russia.  Recognizing Afghanistan as outside the sphere of Russian influence.

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