Anglo-Persian War

The Anglo-Persian War or the Anglo-Iranian War (Persian: جنگ ایران و انگلستان, romanized: Jange Irân va Engelestan) lasted between 1 November 1856 and 4 April 1857, and was fought between the United Kingdom and Iran, which was ruled by the Qajar dynasty. The war had the British oppose an attempt by Iran to press its claim on the city of Herat. Though Herat had been part of Iran under the Qajar dynasty when the war broke out, it had declared itself independent under its own rebellious emir and placed itself under the protection of the British in India and in alliance with the Emirate of Kabul, the predecessor of the modern state of Afghanistan. The British campaign was successfully conducted under the leadership of Major General Sir James Outram in two theatres: on the southern coast of Persia near Bushehr and in southern Mesopotamia.

The war resulted in the Persians withdrawing from Herat and signing a new treaty to surrender its claims on the city and the British withdrawing from southern Iran.