The hydrogen bomb was first tested by the United States during the Cold War on November 1, 1952. This significant event was known as the "Ivy Mike" test and was part of the escalating nuclear arms race following World War II. The Cold War marked a period of intense rivalry between the US and USSR, making it the correct context for this question. ;
The hydrogen bomb was first tested by the United States during the Cold War on November 1, 1952, known as the Ivy Mike test. This test marked a significant escalation in the nuclear arms race following World War II. Therefore, the answer is C. The Cold War.
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