The U.S. 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 annual training, contributing to the Army's readiness and capabilities. Established in 1908, the Army Reserve plays a crucial role in supporting active-duty forces during times of conflict and disaster. Reservists can be called to active duty when needed, providing essential skills and support in various missions, both domestically and internationally.