Thatcher is also known as the "Iron Lady" and is known for her economic policies. She is known for her economic liberalism and policies to reduce state intervention. She was also influential in relations with the Soviet Union during the Cold War. Thatcher also played an important role in the Falklands War and ensured that Britain maintained its sovereignty over the Falkland Islands. In 1990, he resigned from his post as Prime Minister as a result of pressure within the Conservative Party. Margaret Thatcher is remembered as an important politician who garnered both support and criticism for her strong leadership, determination and policies.