Passage: 1921 Persian coup d'état, known in Iran as 3 Esfand coup d'état , refers to several major events in Persia  in 1921, which eventually led to the establishment of the Pahlavi dynasty as the ruling house of the country in 1925. The events began with a coup by the Persian Cossack Brigade headed by Reza Khan, and directed by the British, on 21 February 1921. With this coup Zia'eddin Tabatabaee took over power and became Prime Minister. The coup was largely bloodless and faced little resistance. With his expanded forces and the Cossack Brigade, Reza Khan launched successful military actions to eliminate separatist and dissident movements in Tabriz, Mashhad and the Janglis in Gilan. The campaign against Simko and the Kurds was less successful and lasted well into 1922, though eventually concluding with Persian success.
Did the campaign against the Kurds happen before or after the coup by the Persian Cossack Brigade? How many cities did Reza Khan launch military actions to eliminate separatist and dissident movements in? How many years after the Persian coup d'etat did the the Pahlavi dynasty as of ruling house of the country become established? How many years after the Persian coup d'état was it established that the Pahlavi dynasty was the ruling house of the country? How many years did it take for the Pahlavi dynasty to be in power? How many years span these events? How many yearsd id the campaign against SImko and the Kurds last? What event happened first, the Persian coup d etat, or the campaign against Simko and the Kurds? What year did the Persions succeed with their coup d'etat? When did Zia'eddin Tabatabaee become a servant? Which empire had success in 1922?