first use

Japanese: first use(英語表記)firstuse
first use

...First strike capability and second strike capabilityThe ability to neutralize an enemy's strategic nuclear forces with a preemptive nuclear attack is called a first strike capability, and the ability to launch a retaliatory attack on an enemy with the surviving nuclear forces in a preemptive surprise attack is called a second strike capability. In addition, the use of nuclear weapons before the enemy in the event of a war is called first use, which is distinguished from the first strike capability, which neutralizes an enemy's strategic nuclear forces with a preemptive nuclear attack. The US nuclear strategy has traditionally placed emphasis on second strike capability, arguing that without a sufficient second strike capability that is not vulnerable to enemy attacks, the Soviet Union would be tempted to destroy the US's nuclear forces with a first strike, and nuclear deterrence would become unstable.

*Some terminology explanations that mention "first use" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…第1撃能力first strike capabilityと第2撃能力second strike capability先制核攻撃によって敵の戦略核戦力を無力化する能力を第1撃能力と呼び,敵の核による先制的な奇襲攻撃を受けても生き残った核戦力で敵に報復攻撃を行い,壊滅的打撃を与える能力を第2撃(報復)能力という。また,戦争が発生した場合,敵よりも先に核兵器を使用することを先制使用first useと呼び,先制核攻撃で敵の戦略核戦力を無力化する第1撃能力と区別している。アメリカの核戦略は伝統的に第2撃能力を重視し,敵の攻撃に非脆弱でかつ十分な第2撃能力を保有しないと,ソ連が第1撃によってアメリカの核戦力を破壊する誘惑にかられ,核抑止は不安定になると主張している。…

※「first use」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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