Because not invoking NATO Article V would immediately render the whole alliance useless (as this article is the whole point of NATO) and I'm sure no member of i

Because not invoking NATO Article V would immediately render the whole alliance useless (as this article is the whole point of NATO) and I'm sure no member of it would risk that. Russia pulling a similar trick as in Ukraine on any NATO member without serious consequences would be an achievement comparable to the victory of the Cold War.