It is rude to answer a question with a question. You were obviously raised poorlythe real qestion: why you don't ?
Topic: Collective defence - Article 5 - NATO
https://www.nato.int › cps › natohq › topics_110496
8 Feb 2021 — Highlights · Collective defence means that an attack against one Ally is considered as an attack against all Allies. · The principle of collective ...