The King's School Cadet Corps is the oldest and one of the largest in the country, engaging over 500 boys in various activities during the school year. A compulsory activity for boys in Year 9 and 10, it becomes optional for those in Years 11 and 12. Much of its success is due to the fact that many senior students participate in the Promotions Courses each year to gain rank in Years 11 and 12.
In the Corps, students learn and experience discipline, teamwork and character building exercises, building up to the annual Cadet Camp, where students are challenged and tested. This is a thrilling experience for most students and incorporates military style training and a variety of outdoor education experiences.