noun
collective defense
Primarily used in military and international relations contexts, referring to the principle that an attack against one member is considered an attack against all.
NATOは集団的防衛の原則に基づいている。
NATO is based on the principle of collective defense.
集団的防衛 focuses on mutual defense against external attacks, while 集団安全保障 is a broader concept of maintaining peace through collective action.
Compound of 集団 (group, collective), 的 (-like, -ive), and 防衛 (defense). A straightforward Sino-Japanese term.