Nuclear triad

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A nuclear triad is a three-pronged military force structure of global-range land-based intercontinental ballistic missiles (ICBMs), submarine-launched ballistic missiles (SLBMs), and strategic bombers with nuclear bombs and missiles. More broadly, it can sometimes be used to mean any nuclear force with land, sea, and air basing, and more limited range. Countries build nuclear triads to eliminate an enemy's ability to destroy a nation's nuclear forces in a first-strike attack, which preserves their own ability to launch a second strike and therefore increases their nuclear deterrence. Four countries are known to have a nuclear triad: the United States, Russia, India, and China. The US and the USSR (the predecessor state to Russia) acquired triads as part of the Cold War's nuclear arms race, operationalizing SLBMs during the 1960s. Meanwhile, India achieved one in 2018, and China did so in 2020. France had a nuclear triad, but in 1996 France abandoned its strategic bombers, IRBM underground silo-based S3 missiles, and Hadès SRBMs. Despite becoming the third nuclear power in 1952, the United Kingdom has never operated a triad. Israel likely possesses weapons in a triad structure, but lacks true strategic range in all three 'legs.'