Military defense refers to the strategies and actions taken by a nation to protect itself from external threats or attacks. This includes the use of armed forces, such as the Army, Navy, and Air Force, to deter aggression and respond to conflicts. Military defense also involves intelligence gathering, training, and the development of advanced technologies to enhance security. In addition to active military forces, military defense encompasses various support systems, including logistics, communications, and cybersecurity. These elements work together to ensure that a nation can effectively respond to potential threats and maintain its sovereignty and safety.