The collaboration of NATO with various intergovernmental organizations (IGOs) such as the Organization for Security and Cooperation in Europe (OSCE), the Arab League, and the United Nations Office on Drugs and Crime (UNODC) is examined in this article. It emphasizes Canada’s participation in these collaborations, such as election observation missions, security measures in Iraq, peace efforts in the Israeli-Palestinian conflict, counternarcotics initiatives, and support for drug treatment facilities in Central Asia, highlighting the importance of NATO’s engagement with IGOs in advancing collective defence and promoting peace and security globally.