The Royal Bhutan Army is Bhutan's military service. It includes the Royal Bodyguard and the Royal Bhutan Police. Membership is voluntary, and the minimum age for recruitment is 18. The standing army numbers about 16,000 and is trained by the Indian Army. Being a landlocked country, Bhutan has no navy. It also has no air force or army aviation corps. The Army relies on Eastern Air Command of the Indian Air Force for air assistance.