Milliardo Peacecraft concealed his identity as Zechs Merquise, as which he became a member of the military organization known as OZ.Zechs Becomes a member of the higher ranking officers in OZ.Zechs stands , as some would say, the most talented pilot within the ranks.He is noticed more when he obtains the Mobile Suit Tallgeese , which was the strongest suit there was .. until the gundams appeared.Thus, the Tallgeese was repaired and given to Zechs to fight the gundams with.