This chapter explores how selective service laws for World War II both built on and changed the relationship between youth, education, and national security that had been developed in the preceding decades. Through nationwide debates over what made the disproportionate draft of young men aged eighteen to twenty-five as American and democratic, adults reinterpreted the characteristics of “youth” that had been deemed serious problems in the 1930s. That is, the lack of advanced work experience now indicated immediate availability for military service, unstable lifestyle meant mobility, and mental malleability now signified adaptability to military discipline. The supporters of the youth draft also formalized the link between military duty and education, advocating for the formation of military-educational training for young soldiers with military value as a democratic and American method of conscripting youth.