Super Robot Wars: Neo Generation
The OZ-00MS Tallgeese is one of the earliest mobile suits created by the Earth Federation, contributing to the design of the RX-77-1A Guncannon A and thus all of it’s descendants, such as the famous RX-78-2 Gundam. The Tallgeese is actually superior to the Gundam, but far more difficult to pilot. Unbeknownst to most it was developed from the concept of the Gundam that had been created by the Ray family at the behest of Aeolia Schenberg which eventually resulted in the GN-000 0 Gundam and later developed into the XXXG-00W0 Wing Gundam Zero. It was also developed into the simplified OZ-06MS Leo, which saw some success in the One Year War and is still in service.