Gaiaterra: Elysea's Conflict/The IS Project

Infinite Stratos, abbreviated as IS, are powered exoskeletons, which were originally meant for outer space exploration built off the Rocket Angels suit, combined with the ADI and Alliance jetpacks. Originally designed by a Katsuragi named Tabane Shinonono, they possess technology and combat capabilities far more advanced than any other weapon system, thus threatening to destabilize the world of Gaiaterra. However, the project was abandoned, at least by the Katsuragi, when a group of Encantadians stole their designs and blueprints for use as the personal vehicles of the Sang'gres, their leader of the Aristocracy, and their elite forces. As the lab and its databanks were razed to the ground when a skirmish broke out with the thieves fighting against Lumeris black ops and Serpent Clan Infiltrators, both of whom also wanted to steal the data, with Tabane, and almost all senior IS researchers, getting accidentally killed in the crossfire.

Aftermath
With its creator and almost all of its researchers dead, not to mention the lab and databanks reduced to ruin, the Protectorate cut their losses and completely abandoned the project, using what data and surviving researchers they could salvage to upgrade the Rocket Angel if possible, forever moping about lost potential. The Lumeris got the least data out of the three thieves but had managed to cover their tracks, thus no one knew who was the third party, with the data they got being sold in an auction and used to upgrade their battlesuits. The Community, while able to scourge enough data to make their own sets of powered armor, called Elemental Javelins, abbreviated as EJ, they were unable to cover their tracks, and it was only through shrewd diplomacy, with a little help of espionage, that relations between the Clans and the Protectorate weren't damaged, and the Protectorate remaining unaware that the Javelins contain IS data, but Cantha knew full well that trust between them had been irrevocably soured. With Encantadia being the true victor, even if the data to mass produce the mark 3 and producing the mark 4 was lost (outside of the prototype they managed to steal).