[Republicain]

And what is NATO's mission ? Stop the Red Army ?

[Alberta's Child]

It's a mutual defense treaty among its member nations -- which is why NATO troops were dispatched to Afghanistan to topple the Taliban government after 9/11.

I may be wrong about this, but I'm quite certain there is nothing in the NATO bylaws that indicates the member nations only agree to come to each other's aid in the event of an attack by Warsaw Pact nations.