Reserve Forces are military units composed of personnel who are not in active service but can be called upon during emergencies or times of war. These individuals often have civilian jobs or education but maintain their military training and readiness. Reserve Forces play a crucial role in supporting the regular military by providing additional manpower and specialized skills when needed. In many countries, such as the United States and United Kingdom, Reserve Forces include branches like the Army Reserve, Navy Reserve, and Air Force Reserve. These forces can be mobilized for various missions, including disaster relief, peacekeeping operations, and combat support, ensuring that the military can respond effectively to diverse challenges.