Imperial State
Pahlavi Iran, officially the Imperial State of Iran (), and also known as the Imperial State of Persia from 1925 to 1935, was a sovereign state in Western Asia. It was bordered by Turkey and Iraq to the west, the Soviet Union to the north, Afghanistan and Pakistan to the east and shared a maritime border with Oman toward the south. With a population of 37 million in 1979, Tehran served as its capital city.