The Gelgoog is Zeon's final mass-produced mobile suit, a vicious machine that rivals the Federation's dreaded Gundam in terms of performance and firepower. Intended as a replacement for the aging MS-06F Zaku II as a primary front line unit, the MS-14A Gelgoog was a high-performance mobile suit, arguably as powerful as - if not more powerful than - the Federation's Gundam. However, its late and haphazard introduction to the battlefield prevented the technological superiority of the Gelgoog from changing the course of the war, and its capabilities were largely wasted in the hands of poorly-trained student recruits. Only 165 units were produced and put into combat by the last day of the war at the Battle of A Bao A Qu on 31 December UC 0079 mostly piloted by novice pilots and fresh recruits who couldn't use their powerful new Gelgoogs effectively against veteran Federal pilots in less-powerful mass-produced GMs.