Answer:
The Soviet acquisition of atomic weapons and the spread of communism in China led to heightened tensions between the United States and the Soviet Union during the Cold War.
Step-by-step explanation:
The Soviet acquisition of atomic weapons in 1949 led to a global shift in power dynamics, as it created a new kind of weapon that could destroy entire cities and nations.
The Soviet Union's possession of atomic weapons increased tensions with the United States and led to a nuclear arms race, which defined much of the Cold War period.
The spread of communism in China in 1949, led by Mao Zedong and the Chinese Communist Party, was seen as a major victory for the Soviet Union, as it extended the reach of the communist ideology beyond the borders of the Soviet Union.
The Chinese revolution was a significant event in the Cold War, as it challenged the United States' efforts to contain communism and spread democracy around the world.
The Soviet acquisition of atomic weapons and the spread of communism in China helped to fuel anti-communist sentiment in the United States and other Western countries, leading to increased military spending and the establishment of NATO as a collective defense alliance.