The Cold War began as World War II ended, pitting the United States against the Soviet Union in a global struggle for influence. This era saw the formation of NATO and the Warsaw Pact, as well as the division of Germany and Berlin, symbolizing the larger ideological divide. The period from 1945 to 1953 was marked by rising tensions, including the Berlin Blockade and the Korean War. The nuclear arms race intensified, while propaganda efforts shaped public opinion on both sides. These events set the stage for decades of superpower rivalry.