In 1917, Britain used Persia as the springboard for an attack into Russia in an unsuccessful attempt to reverse the Russian Revolution of 1917.
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On 21 February 1921, Ahmad Shah was pushed aside in a military coup by his Minister of War and commander of the Cossack garrison, Colonel Reza Khan, who subsequently seized the post of Prime Minister.
He then turned to Ahmad Shah Qajar and the Imperial Court of Tehran, presenting himself as a fiercely loyal defender and advocate of the Qajar dynasty, and calling upon the Court to take action against the ambitions of Reza Khan.
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