Artillery is used to protect ground troops and sea forces from air attack.
Hawk Missile ADA Patriot Missile ADA Field Artillery Field Artillery General Light Missile Field Artillery Field Artillery Target Acquisition Cannon Field Artillery Education Requirement. The infantry is the backbone of the military. Infantry officers lead specially trained units to destroy enemy ground forces, operate and fire a variety of weapons, parachute from transport planes, and conduct extended patrol missions. At the present time this combat occupation is restricted to male military members only. However, things change.