Article 4
Article 4 is generally considered the starting point for major NATO operations and therefore is intended for either emergencies or situations of urgency. It officially calls for consultation over military matters when "the territorial integrity, political independence or security of any of the parties is threatened."[18] Upon its invocation, the issue is discussed in the NAC, and can formally lead into a joint decision or action (logistic, military, or otherwise) on behalf of the Alliance.[19] It has been officially invoked seven times since the alliance's creation.[20]