Proper posture starts with a good understanding of the muscles that are involved in posture. Several different muscles are responsible for maintaining upright posture, and over time, poor posture can cause these muscles to lose strength.
Air Force. A major in the Air Force typically has duties as a senior staff officer at the squadron and wing level. In flying squadrons majors are generally flight commanders or assistant directors of operations. In the mission support and maintenance groups majors may occasionally be squadron commanders.
Rating Newest Oldest. Best Answer: Army It has the primary responsibility for land-based military operations. More of an occupational force than an invasion force. the largest branch of the armed forces of the US. It is currently bumping deployments up to 15 months with no end in sight USMC The United States Marine Corps serves as an amphibious force-in-readiness.