The USSR went through many changes in the 1980s that ultimately led to the end of the Cold War. The Soviet Union was struggling with financial problems due to mismanagement of state-owned businesses and the high costs of military commitments. It was also failing to win the Afghanistan war and could no longer afford to maintain military control over Eastern Europe. Additionally, the Chernobyl disaster and poverty within the USSR and Eastern bloc countries increased pressure for reform. Meanwhile, US President Ronald Reagan intensified pressure on the Soviet Union through military buildup and initiatives like Star Wars, while figures like Pope John Paul II and UK Prime Minister Margaret Thatcher also challenged Soviet influence. USSR leader Mikhail Gorbachev introduced reforms like glasn