Alliances are formal agreements between two or more parties to cooperate for specific purposes, often in political, military, or economic contexts. These partnerships can enhance security, promote trade, or strengthen diplomatic relations. For example, the North Atlantic Treaty Organization (NATO) is a military alliance formed to ensure collective defense among its member countries. In international relations, alliances can influence global dynamics and power structures. They can deter aggression from rival states and provide a platform for collaboration on shared interests. However, alliances can also lead to tensions if members have conflicting goals or if new threats emerge, prompting a reevaluation of partnerships.