callup

Call-up is the act of summoning someone to join a group, perform a duty, or participate in an event, typically via an official notice. It has military origins but is used in varied contexts such as sports, emergency services, and organizational recruitment. In many systems, a call-up is distinct from voluntary enlistment, as it is triggered by a need or obligation rather than personal choice.

Military usage: In countries with conscription, a call-up notice or order summons eligible individuals to report for service. The process may include medical screening, assignment to a branch or unit, and training. Deferments, exemptions, or age limits can affect eligibility. The duration and terms of service vary by country and era, and demobilization follows completion of duty.

Sports usage: In professional sports, a call-up refers to promoting a player from a junior, reserve, or academy squad to the senior team or national squad. A call-up may be temporary, to cover an injury or congested schedule, or permanent, if the player establishes themselves at the higher level. The term is common in football, cricket, baseball, and other team sports.

Other uses: In emergency services or volunteer organizations, a call-up summons members to report for duty during a crisis or training period. In corporate or recruitment contexts, the term can describe inviting a candidate to attend an interview or training session, though this usage is less common.