As being one of the main events of Iran’s contemporary history, Feb. 22nd 1921 was carried out in Iran and was backed by the British due to some reasons including 1919 treaty not being concluded by the Majlis, preventing the expansion of Communist Russia in Iran, and safeguarding its interests in India. The British attempted to execute the contents of the 1919 treaty through his protégé in Iran. At first they appointed Seyyed Ziaaddin Tabatabai who was a journalist as its main tool, and following much talks and considerations, lieutenant colonel Reza Khan became the commandant of the cassock forces and the military man of the coup. Eventually, the Cossacks entered Tehran under Reza Khan and after a short clash with the gendarmerie, they took control of Tehran. Martial law was declared, and some members of the society were detained, and the contents of 1919 were cancelled superficially.
The following documents give ideas of the events of those days including Seyyed Zia’s being appointed as prime minister, his introducing his cabinet members, appointment of Colonel Kazem Khan Sayyah as the military governor of Tehran, the famous declarations beginning as “ I order” by Reza Khan, closure of clubs and theaters and etc.