Margaret Thatcher was known as the "Iron Lady" and served as the Prime Minister of the United Kingdom from 1979 to 1990. Her tenure was marked by a strong conservative ideology, advocating for free-market policies, deregulation, and a reduction in the power of trade unions. Thatcher's government focused on privatizing state-owned industries and reducing public spending, which she believed would revitalize the British economy. Her decisiveness and often controversial policies earned her both praise and criticism, solidifying her status as a prominent and polarizing figure in British and global politics.