> NATO countries historically didn't invoke Article 5 even for terrorist attacks killing their own citizens The only time Article 5 has been invoked was when t

> NATO countries historically didn't invoke Article 5 even for terrorist attacks killing their own citizens The only time Article 5 has been invoked was when terrorists attacked America in 9/11. And a lot of non-NATO countries offered support too, including Ukraine. https://en.wikipedia.org/wiki/Participants_in_Operation_Enduring_Freedom#Ukraine https://en.wikipedia.org/wiki/Participants_in_Operation_Endu...