The Mujahedin-e Khalq (MEK) is an Iranian opposition group founded in 1965. Initially established to oppose the Shah of Iran, the organization later became known for its opposition to the Islamic Republic after the 1979 revolution. The MEK has been involved in various political and military activities, advocating for a democratic Iran. The group has a controversial history, including its past alliance with Saddam Hussein during the Iran-Iraq War. Over the years, the MEK has been designated as a terrorist organization by some countries, although it has since been removed from such lists in others, including the United States.