Pedantically, it takes 1 year to officially leave NATO: https://en.wikipedia.org/wiki/Withdrawal_from_NATO#:~:text=The%20Withdrawal%20Clause&text=This%20means%2

Pedantically, it takes 1 year to officially leave NATO: https://en.wikipedia.org/wiki/Withdrawal_from_NATO#:~:text=The%20Withdrawal%20Clause&text=This%20means%20that%20after%2020,a%20year%20it%20formally%20leaves. https://en.wikipedia.org/wiki/Withdrawal_from_NATO#:~:text=T... If they invade, I would guess they would (a) not bother to formally leave NATO, (b) just do it, and (c) have Ambassador Whitaker mount a Denial of Service attack on any Art 5 response. Fortunately for anyone still believing in rule of law, there are not only non-NATO collective defence agreements already in place, but there are even non-collective-defence ways to trigger Art 21: https://legal.un.org/ilc/texts/instruments/english/draft_articles/9_6_2001.pdf#page=6 https://legal.un.org/ilc/texts/instruments/english/draft_art...