The Mojahedin Khalq Organisation is an Iranian political party that helped Khomeini's religious sect in Iran bring about the Islamic revolution of 1979, after being at the forefront of opposition to the rule of the Shah. However, as the revolution got underway the Mojahedin were sidelined by the religious clerics and were expelled from the political arena. They responded by attacking the dominant polity through democratic means (such as political demonstrations), and later through armed resistance, to become the most significant opposition power base to the current regime of Iran. Since 1997 the Organisation has dissolved and depleted, and now functions at little more than a rhetoric level. This book provides a detailed history of the Organization and its members, and addresses its complex relationship with western and international powers, most specifically the United States, in their endeavours to harness agreement to topple the Islamic Republic of Iran.