The Active Duty Army is a full-time professional military force responsible for conducting land-based military operations worldwide. Soldiers serve full-time, maintaining constant readiness to respond to conflicts, emergencies, and national defense missions
The Army Reserve is a part-time military force that supports the Active Army by providing trained units and soldiers who can be mobilized for active duty when needed. Reservists typically serve part-time while maintaining civilian careers or education but train regularly to maintain readiness.