From the official text[1]: - Article 4: The Parties will consult together whenever, in the opinion of any of them, the territorial integrity, political indepen

From the official text[1]: - Article 4: The Parties will consult together whenever, in the opinion of any of them, the territorial integrity, political independence or security of any of the Parties is threatened. - Article 5: The Parties agree that an armed attack against one or more of them in Europe or North America shall be considered an attack against them all and consequently they agree that, if such an armed attack occurs, each of them [...] will assist the Party or Parties so attacked by taking forthwith [...] such action as it deems necessary, including the use of armed force, to restore and maintain the security of the North Atlantic area. --- [1]: https://www.nato.int/cps/en/natolive/official_texts_17120.htm https://www.nato.int/cps/en/natolive/official_texts_17120.ht...