The Army Reserve is a branch of the United States Army that allows individuals to serve part-time while maintaining civilian careers or education. Members typically train one weekend a month and participate in a two-week training period each year. This structure enables them to support military operations without being on active duty full-time. Reservists can be called to active duty during emergencies, natural disasters, or military conflicts. They play a crucial role in providing additional manpower and specialized skills, ensuring that the Army is prepared to respond to various challenges while balancing their civilian lives.