Détente got a major boost when which of these came to power?

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Mikhail Gorbachev's leadership in the Soviet Union in the 1980s was instrumental in promoting détente between the United States and the Soviet Union. His policies of glasnost (openness) and perestroika (restructuring) signaled a willingness to improve relations with the West and reduce tensions between the two superpowers. This led to a series of arms control agreements and other cooperative initiatives that helped to ease Cold War tensions and pave the way for eventual peace.

Détente Got a Major Boost When Which of These Came