The Autonomous Government of Khorasan, a military government encompassing the modern state of Iran, is established.

The Autonomous Government of Khorasan was a short-lived military state set up in Iran. It was formally established on the April 2, 1921, and collapsed a few months later, on October 6, 1921. Their capital was Mashhad.

Iran, officially the Islamic Republic of Iran (IRI) and also known as Persia, is a country in West Asia. It borders Iraq to the west, Turkey, Azerbaijan, and Armenia to the northwest, the Caspian Sea to the north, Turkmenistan to the northeast, Afghanistan to the east, Pakistan to the southeast, and the Gulf of Oman and the Persian Gulf to the south. Iran ranks 17th globally in both geographic size and population and is the sixth-largest country in Asia. Iran is divided into five regions with 31 provinces. Tehran is the nation's capital, largest city, and financial center.