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 consists of North American and European countries committed to mutual defense. Countries form military alliances to deter aggression and enhance their defense capabilities. By working together, allied nations can respond more effectively to threats, ensuring that they are stronger together than they would be individually. Such partnerships can also promote stability and peace in various regions around the world.