Second Herat War
The Second Herat War (late March 1856–26 October 1856) was the invasion of the surrounding realm of Herat and the successful siege of its citadel by the Qajar army led by Hesam o-Saltaneh, Soltan Morad Mirza. The 1856 siege was part of the concerted Qajar effort to compensate the recent territorial losses in the Russo-Persian Wars of 1804–1813 and 1826–1828 by reconquering western Afghanistan, which had historically been a part of Persia's domain. The conflict was also a part of the broader Great Game between the British Empire and the Russian Empire. The Persian expedition into Herat was contrary to an agreement with the United Kingdom signed by Naser al-Din Shah in January 1853. According to this agreement, the Persian Government would refrain from sending troops to or interfering in the internal affairs of Herat.