What is the term for a requirement imposed by the government for individuals to serve in the military?

The term that refers to a requirement imposed by the government for individuals to serve in the military is "Draft." The draft is a system where certain individuals are called up to serve in the armed forces, typically during times of war or national emergency. This requirement is enforced by the government to ensure that the military has enough personnel to meet its operational needs.

In contrast, Selective Service is associated with the registration process for the draft but does not itself express the act of requiring military service. Exemption refers to situations where individuals may not be required to serve due to various reasons, such as medical issues or other considerations. Desert relates to the act of leaving military service without permission, which is considered a serious offense. Thus, "Draft" specifically identifies the obligation to enlist in the military, making it the correct choice.