Qajar Iran and the Ottoman Empire determine their international boundary in the second treaty of Erzurum.

The Guarded Domains of Iran, commonly known as Qajar Iran, was the Iranian state under the rule of the Qajar dynasty, which lasted from 1789 to 1925. It was founded by Agha Mohammad Khan, a chieftain of the Qajar tribe, a Turkic tribe based in northern Iran. In the power struggle following the…