![](db/pages/2023/01/31/001/zimg_001_1.jpg)
In 1921 Reza Khan (later Reza Shah Pahlavi), an officer in Iran's only military force (Cossack Brigade) used his troops to support a coup against the government of Qajar Dynasty. Within four years he had established himself as the most powerful person in the country by suppressing rebellions and establishing order.