Reza Shah; The Father of Modern Iran

On 14 January 1921, the commander of the British Forces in Iran, General Edmund "Tiny" Ironside, promoted Reza Khan, who had been leading the Tabriz battalion, to lead the entire brigade.[15] About a month later, under British direction, Reza Khan led his 3,000-4,000 strong detachment of the Cossack Brigade, based in Niyarak, Qazvin, and Hamadan, to Tehran and seized the capital.