Verified for the 2025 AP World History: Modern exam•Citation:
The Cold War, a decades-long geopolitical struggle between the United States and the Soviet Union, came to an end with the collapse of the Soviet Union in 1991. A combination of internal economic stagnation, costly foreign interventions, technological disparity, and increasing popular resistance contributed to the downfall of communist regimes across Eastern Europe and the end of the bipolar world order.
By the 1980s, the strain of Cold War competition—militarily, politically, and economically—was becoming unsustainable for the Soviet Union. The United States, under Ronald Reagan, sharply increased defense spending and took a more aggressive anti-communist stance, including initiatives like the Strategic Defense Initiative (also known as “Star Wars”).
The United States held a decisive advantage in technological innovation and military capability by the late Cold War period:
This arms race placed immense pressure on the Soviet economy, which was already struggling with inefficiency and stagnation.
In 1979, the Soviet Union invaded Afghanistan to prop up a faltering communist government. The invasion proved to be one of the most costly mistakes in Soviet foreign policy.
⭐ The Soviet invasion of Afghanistan has often been referred to as "the USSR’s Vietnam"—a drawn-out conflict that drained resources and eroded public trust in the government.
When Mikhail Gorbachev became General Secretary in 1985, he introduced sweeping reforms to revitalize the Soviet Union.
These policies had unintended consequences:
By 1989, a wave of revolutions swept through Eastern Europe:
These events signaled the end of Soviet dominance in the region and marked a decisive turn in the Cold War.
Despite reform efforts, Gorbachev faced mounting pressure from both conservatives and reformists. In 1991, a failed coup by hardline communists accelerated the disintegration of Soviet authority.
The Russian Federation emerged as the USSR’s successor, with Boris Yeltsin elected as its first president.
The end of the Cold War was also marked by diplomatic progress between the United States and the USSR.
Treaty/Agreement | Year | Key Terms | Significance |
---|---|---|---|
INF Treaty | 1987 | Eliminated short- and medium-range nuclear missiles | First treaty to reduce—not just limit—nuclear weapons |
Strategic Arms Reduction Treaty (START I) | 1991 | Cut long-range nuclear arsenals by 25-30% | Symbolized end of Cold War tensions |
Reunification of Germany | 1990 | East and West Germany formally unified under NATO terms | Ended decades of division; symbolized Cold War’s end |
These agreements reflected mutual recognition that the arms race had become unsustainable and that cooperation was essential for global stability.