 An Army or Marine Corps lieutenant general typically commands a corps-sized unit (20,000 to 45,000 soldiers), while an Air Force lieutenant general commands a large Numbered Air Force consisting of several wings.Additionally, lieutenant generals and vice admirals of all services serve as high-level staff officers at various major command headquarters and the Pentagon, often as the heads of their departments.In the Russian and Soviet armies, the three-star rank is colonel-general (Russian