Active duty refers to a status in which military personnel are serving full-time in their respective branches, such as the Army, Navy, Air Force, or Marine Corps. During this time, service members are engaged in training, missions, or other military responsibilities and are typically stationed at bases or deployed to various locations. While on active duty, service members receive a salary, benefits, and housing allowances. This status can last for a specific period or be indefinite, depending on the needs of the military and the individual's contract. Active duty is distinct from reserve duty, where personnel serve part-time while maintaining civilian jobs.