enormous tension between the two nations until the Anglo-Soviet Invasion of Iran. The coup d'état of 1921 was partially assisted by the British government, which wished to halt the Bolsheviks' penetration of Iran, particularly because of the threat it posed to the British possessions in India. It is thought that the British provided "ammunition, supplies and pay" for Reza's troops. On 8 June 1932, a British Embassy report states that the British were interested in helping Reza Shah create a centralizing power. General Ironside gave a situation report to the British War Office saying that a capable Persian officer was in command of the Cossacks and this "would solve many difficulties and enable us to depart in peace and honour". Reza Khan spent the rest of 1921 securing Iran's interior, responding to a number of revolts that erupted against the new government. Among the greatest threats to the new administration were the Persian Soviet Socialist Republic, which had been established in Gilan, and the Kurds of Khorasan. Overthrow of the Qajar dynasty From the beginning of the appointment of Reza Khan as the minister of war, there was ever increasing tension with Zia ol Din Tabatabaee, who was prime minister at the time. Zia ol Din Tabatabaee wrongly calculated that when Reza Khan was appointed as the minister of war, he would relinquish his post as the head of the Persian Cossack Brigade, and that Reza Khan would wear civilian clothing instead of the military attire. This erroneous calculation by Zia ol Din Tabatabaee backfired and instead it was apparent to people who observed Reza Khan, including members of parliament, that he (and not Zia ol Din Tabatabaee) was the one who wielded power. By 1923, Reza Khan had largely succeeded in securing Iran's interior from any remaining domestic and foreign threats. Upon his return to the capital he was appointed Prime Minister, which prompted Ahmad Shah to leave Iran for Europe, where he would remain (at first voluntarily, and later in exile) until his death. It induced the Parliament to grant Reza Khan dictatorial powers, who in turn assumed the symbolic and honorific styles of Janab-i-Ashraf (His Serene Highness) and Hazrat-i-Ashraf on 28 October 1923. He quickly established a political cabinet in Tehran to help organize his plans for modernization and reform. By October 1925, he succeeded in pressuring the Majlis to depose and formally exile Ahmad Shah, and