1945 was the first year that a Nuclear bomb was successfully tested then used in combat.
That is when they were first:developedtested: July 16used in combat: August 6 & 9
1945 bombs droped on japan 1949 Russia created a nuclear bomb 1957brittan got a nuke
Nuclear weapons against mankind happened in 1945. Other than that it has not happened again.
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Since 1945.
August 6, 1945: HiroshimaAugust 9, 1945: Nagasaki
From 1945 until the late 1970s or early 1980s the United States always had the most nuclear weapons. After then the USSR/Russia has had the most nuclear weapons.
Only the US.