Lehi and the Irgun were jointly responsible for the massacre in Deir Yassin. Lehi assassinated Lord Moyne, British Minister Resident in the Middle East, and made many other attacks on the British in Palestine. On 29 May 1948, the government of Israel, having inducted its activist members into the Israel Defense Forces, formally disbanded Lehi, though some of its members carried out one more terrorist act, the assassination of Folke Bernadotte some months later, an act condemned by Bernadotte's replacement as mediator, Ralph Bunche. After the assassination, the new Israeli government declared Lehi a terrorist organization, arresting some 200 members and convicting some of the leaders. Just before the first Israeli elections in January 1949, a general amnesty to Lehi members was granted by the government. In 1980, Israel instituted a military decoration, an "award for activity in the struggle for the establishment of Israel", the Lehi ribbon. Former Lehi leader Yitzhak Shamir became Prime Minister of Israel in 1983.