The article focuses on the relation between Persia and Great Britain after the discovery of oil in Persia. It mentions that after the oil discovery in Persia in 1908, the British legation was in control of the capital, Tehran, and Anglo-Persian Oil Co. was drilling oil at a constant rate. During the period, Russia and Germany also showed interest in Persia. After Major Reza Khan took the throne, there was tension in the British and Persian relations, and Persia declined British power.