1722 The Safavid Empire of Iran is defeated by an army from Afghanistan at The Battle of Gulnabad, pushing Iran into anarchy.
1946 Iran: Qazi Muhammad declares the independent people's Republic of Mahabad at Chuwarchira Square in the Kurdish city of Mahabad. He is the new president; Hadschi Baba Scheich is the prime minister.
1960 A severe earthquake shakes Lar in Fars province, Iran and kills more than 200 people.
1963 Movement of 15 Khordad: Protest against arrest of Ayatollah Ruhollah Khomeini by Shah of Iran, Mohammad Reza Pahlavi. In several cities, masses of angry demonstrators are confronted by tanks and paratroopers.
1967 Protests in West Berlin against the arrival of the Shah of Iran turn into riots, during which Benno Ohnesorg is killed by a police officer. His death results in the founding of the terrorist group Movement 2 June.
1971 The start of the 2500-year celebration of Iran, celebrating the birth of Persia.
1979 The Shah of Iran flees Iran with his family and relocates to Egypt.
1979 The Ayatollah Khomeini is welcomed back to Tehran, Iran after nearly 15 years of exile.
1979 Iran becomes an Islamic Republic by a 98% vote, officially overthrowing the Shah.
1980 Institution of sharia in Iran.
1980 Iraq invades Iran.
1981 Iran Hostage Crisis: United States and Iranian officials sign an agreement to release 52 American hostages after 14 months of captivity.
1981 Twenty minutes after Ronald Reagan is inaugurated, at age 69 the oldest man ever to be inaugurated as U.S. President, Iran releases 52 American hostages. It is the first Presidential inauguration to be held at the west front of the Capitol.
1981 A Richter Scale 6.9 magnitude earthquake at Golbaf, Iran, kills at least 2,000.
1982 Iranian diplomats kidnapping (1982): four Iranian diplomats are kidnapped by Lebanese militia in Lebanon.
1986 Iran-Contra Affair: The Lebanese magazine ''Ash-Shiraa'' reports that the United States has been secretly selling weapons to Iran in order to secure the release of seven American hostages held by pro-Iranian groups in Lebanon.
1986 Iran-Contra Affair: National Security Council member Oliver North and his secretary start to shred documents implicating them in the sale of weapons to Iran and channeling the proceeds to help fund the Contra rebels in Nicaragua.
1988 The United States launches Operation Praying Mantis against Iranian naval forces in the largest naval battle since World War II.
1999 Days of student protests begin after Iranian police and hardliners attack a student dormitory at the University of Tehran.
2002 An earthquake measuring 6.5 Mw strikes a region of northwestern Iran killing at least 261 people and injuring 1,300 others and eventually causing widespread public anger due to the slowness of the victims receiving aid and supplies.