Is Article V the one that says if a good, dues-paying member of NATO (such as Ukraine) were to be attacked by a meanie (like Russia) then all the other NATO members would be obligated to join in defense of their fellow NATO partner?
Because ... you know ... I see a problem ...
The only time Art 5 was invoked was in redponse to 9/11. NATO countries sent military forces to join US forces in fighting the Taliban. Many instances of the heroism and effectiveness of those NATO troops were often highlighted here on FR.