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Prime Minister Reza Shah, the founder of the Pahlavi dynasty, initially served as Prime Minister of Iran from 1925 to 1926, a role he assumed after he led a military coup and successfully deposed the Qajar dynasty. During his premiership, Reza Shah implemented a number of reforms aimed at modernizing the country's military and infrastructure. In 1926, he was proclaimed the Shah of Iran, officially establishing the Pahlavi dynasty.