Military service refers to the duty of individuals who enlist in the armed forces to protect and defend their country. This service can involve various roles, including combat positions, support functions, and administrative tasks. Members of the military may serve in different branches, such as the Army, Navy, Air Force, or Marine Corps, and can be deployed domestically or internationally. Individuals in military service often undergo rigorous training to prepare for their responsibilities. They may also receive benefits such as education assistance, healthcare, and retirement plans. Military service can be voluntary or mandatory, depending on the laws of a country, and it plays a crucial role in national security.