No, you're under no obligation for any future military service.

No. JROTC is not a required course at Detroit Collgiate Prep High School. 

JROTC stands for Junior Reserve Officer's Training Corps. It is a military regulated high school program whose purpose is to educate high school students in leadership roles while making them aware of the benefits of citizenship. The mission of JROTC is to motivate young people to become better American citizens.

The material covered in the program varies throughout the year, with short segments of leadership training, basics of citizenship and other topics related to the U.S. Army. The Army JROTC curriculum also covers topics such as U.S. Military History, first aid, human relations, good techniques for oral communication, drill and ceremony, military map reading, personal hygiene, marksmanship, orienteering, and staff functions and procedures.