Treaty of Paris (1857)

[1][2] In the Treaty, the Persians agreed to withdraw from Herat, later allowing Dost Mohammad Khan of Afghanistan to occupy it.

The British strategic interests in Afghanistan, an early consequence of the Great Game, ultimately brought an end to Qajar hopes to preserve Herat as a frontier vassalage, after more than fifty years of Iranian engagement.

Three and a half centuries of nearly continuous, although frequently chaotic, inclusion of Herat as part of Iran came to an end with the Treaty of Paris.

The Qajar government realized the serious repercussions of confronting a European colonial power militarily after the conflict in Herat.

The Iranians realized that in the age of empires, they would have to endure losing territory on its outskirts in order to protect its center.