Conscription, often referred to as the draft, is a system where individuals are required by law to serve in the military. This practice is typically implemented during times of war or national emergency when volunteer enlistment does not meet the military's needs. Countries may have different age requirements and criteria for conscription, which can vary widely. The process of conscription usually involves a selection system, where eligible individuals are chosen randomly or based on specific criteria. Many nations, such as the United States and Israel, have used conscription at various points in their history to bolster their armed forces during conflicts.