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  • Nuclear warfare is a military conflict or political strategy in which nuclear weaponry is used to inflict damage on the enemy. Compared to conventional warfare, nuclear warfare can be vastly more destructive in range and extent of damage, and in a much shorter time. A major nuclear exchange would have long-term effects, primarily from the fallout released, and could also lead to a "nuclear winter" that could last for decades, centuries, or even millennia after the initial attack. Some analysts claim that with this potential nuclear winter side-effect of a nuclear war almost every human on Earth could starve to death, While other analysts, that dismiss the nuclear winter hypothesis, calculate that with nuclear weapon stockpiles at Cold War highs, in a surprise countervalue global nuclear war, megadeaths to billions of casualties would have resulted but billions of people would nevertheless have survived the global thermonuclear war. As of 2014, only two nuclear weapons have been used in the course of warfare, both by the United States near the end of World War II. On August 6, 1945, a uranium gun-type device was detonated over the Japanese city of Hiroshima.