I have to disagree.......
NATO was set up as a defensive program to "protect" the countries that join it.
It purpose is to stop aggression against NATO Countries.
If Turkey were to Start a war with Russia (as example) I don't believe the other NATO Countries would join "into" a war, if a NATO country started it.
Simply because you are a NATO country doesn't obligate you to join into a war that another NATO country Starts, It does obligate you to defend another NATO Country from aggression, (meaning first attack).
If Turkey were to suddenly declare war on Russia....I seriously doubt that any other country would join/follow Turkey in to a War.
Love,
Liz