In Thailand, the Territorial Defense Student program, known as Ror Dor (ร.ด.), is a youth military-training track operated by the Territorial Defense Command of the Royal Thai Army. It serves as one of the main ways students can meet military-service requirements and enter the reserve force. Who Joins and When Enrollment is voluntary and open to male and female students. Most start from age 15 onward, typically during Mathayom 4–6 (roughly ages 15–18), and complete three years of training. For males, finishing all three years is a legally recognized alternative to entering the conscription lottery. Legal Context and Purpose Thailand has mandatory military service for male citizens, with conscription at age 21. Completing all three Ror Dor levels grants full exemption. Partial completion reduces service time if drafted: Year 1 cuts service from 2 years to 1.5 years. Year 2 cuts service to 6 months. Graduates receive the reserve rank of sergeant. Training Structure Training f...