Military alliances are agreements between countries to support each other in times of conflict or war. These alliances can involve sharing resources, intelligence, and military forces to enhance collective security. Examples include NATO (North Atlantic Treaty Organization), which was formed to provide mutual defense against potential threats, particularly during the Cold War. Countries often enter military alliances to deter aggression from adversaries and to strengthen their defense capabilities. By collaborating, allied nations can coordinate their military strategies and share the burden of defense costs. Such partnerships can also promote stability in regions by discouraging hostile actions from other states.