PARIS — The number of military personnel engaged in peacekeeping operations around the world fell to the lowest in at least a quarter century in 2025, and geopolitical tension and lack of funding are jeopardizing the viability of multilateral peacekeeping, according to research by the Stockholm International Peace Research Institute. The number of international personnel deployed for peace operations fell to 78,633 at the end of December, down 17% from a year earlier, SIPRI said in a report