Yitzhak Shamir was an Israeli politician who served as the Prime Minister of Israel twice, first from 1983 to 1984 and then from 1986 to 1992. He was a member of the Likud party and played a significant role in shaping Israeli policy during his time in office. Shamir was known for his strong stance on security and his opposition to territorial concessions in peace negotiations. Before entering politics, Shamir was involved in the Irgun, a Jewish paramilitary organization, and later the Lehi group, which fought for the establishment of a Jewish state. His leadership was marked by a focus on national unity and a commitment to the security of Israel amidst ongoing regional conflicts.