Towering over the battlefield, Super Heavy Infantry are the infantry units that use advanced heavy exoskeletons. Super Heavy Infantry units (SHIs) were designed and manufactured by an international consortium from Earth for use in the UNAF. Today, SHIs are considered a key component of modern armies. Modern SHIs operate alone, as they are organized into armored units which involve the support of heavy infantry. They are also often supported by surveillance or ground-attack aircraft.