The great tremor of the Persian political landscape occurred when the involvement of General Edmund Ironside eventually led to the rise of Reza Shah Pahlavi in the 1920s. The popular view that the British were involved in the 1921 coup was noted as early as March 1921 by the American embassy and relayed to the Iran desk at the Foreign Office. A British Embassy report from 1932 concedes that the British put Reza Shah "on the throne".