What did the Spartans boys do at age 20?

At age 20, Spartan boys officially became full citizens and entered the military service known as the "agoge," which was a rigorous training program designed to prepare them for a life of discipline, endurance, and combat. They continued their training, participated in military campaigns, and were expected to demonstrate loyalty to their comrades and the state. This transition marked their movement from youth to adulthood, emphasizing the importance of service to Sparta above all else.