Army reserves are typically comprised of volunteer citizens to have basic army training but lead a civilian lifestyle, whereas the regular army is when someone devotes their entire life to training. Army reserves are the organization of a military reserve primarily composed of ordinary citizens of a country who enter a military role while maintaining a civilian career.
The majority of participants who register with the Army Reserves are not generally kept under arms. The primary function of a member of the Army Reserves is to be able to fight when a nation mobilizes its armed forces unit for total war or defend their country.