The claim that “nine countries have nuclear weapons, but only one has ever used them” sounds dramatic—and it contains an important historical distinction. Today, nine states are generally recognized as possessing nuclear weapons: the United States, Russia, China, France, the United Kingdom, India, Pakistan, Israel, and North Korea. Yet when it comes to using nuclear weapons in war, the historical record is very different.
The United States is the only country to have used nuclear weapons in armed conflict. In August 1945, during the final stages of World War II, the United States dropped atomic bombs on the Japanese cities of Hiroshima and Nagasaki. The Hiroshima bombing took place on August 6, followed by Nagasaki on August 9. Japan announced its surrender days later, bringing World War II to an end.
This does not mean America is the only country that has ever detonated a nuclear weapon. That distinction is crucial.
Several other nuclear-armed states have conducted nuclear tests. The Soviet Union carried out its first nuclear test in 1949, followed by the United Kingdom in 1952, France in 1960, China in 1964, India in 1974, Pakistan in 1998, and North Korea beginning in 2006. Israel is widely believed to possess nuclear weapons but has maintained a policy of nuclear ambiguity and has not officially acknowledged conducting a nuclear test.
Therefore, saying that “only America has ever used nuclear weapons” is accurate if “used” means used against an enemy in wartime. If the word includes nuclear testing, however, the statement becomes misleading because several countries have detonated nuclear devices during weapons tests.
The distinction matters because nuclear weapons have shaped international politics for more than eight decades. After Hiroshima and Nagasaki, the world entered the nuclear age. The United States and Soviet Union subsequently built enormous arsenals, creating the doctrine of mutually assured destruction, under which a nuclear war between major powers could potentially result in catastrophic destruction for both sides.
Today, nuclear weapons remain a major component of global security and geopolitical competition. India and Pakistan, for example, possess nuclear arsenals while maintaining a long-standing rivalry. North Korea has continued developing its nuclear and missile capabilities, while China, Russia, the United States and other nuclear powers maintain significant arsenals.
The viral exchange therefore raises a legitimate historical question, but it should be presented carefully. Nine countries possess nuclear weapons, while only one country—the United States—has used nuclear weapons in warfare. Several other nuclear powers have nevertheless conducted nuclear tests.
The difference between possessing, testing and using nuclear weapons in war is essential to understanding the history of the nuclear age.
