At the end of the One Year War, when the war situation was in a stalemate, a case of pilots with excellent sensitivity called Newtype was recognized, and the Principality of Zeon used Newtype abilities in the war under the control of the general army. Various research and development were carried out toward weapons operation, including private research groups. It can be said that the idea of Zeon Zum Deikun, who advocated the awakening of a new human being living in outer space, was conveniently overwritten here for weapon operation. The Earth Federation government, which was strongly skeptical about the concept of the Newtype, also gradually began to pay attention to these cases. Information about Zeon's Newtype exclusive weapons, which had been brought to us through intelligence agencies, was gradually beginning to affect a part of the Federation. Also, especially in the records of Second Lieutenant Amuro Ray of the 13th Independent Squadron, which can be seen in the battle reports on the front line, there are many examples of the emergence of Newtypes that can only be thought of as such. As a matter of course, the Earth Federation government and the Federation Forces gathered together a council to use Newtypes as weapons in the same way as Zeon. FSWS = Federal S.U.I.T Weapon System here is a general term for the Federal Army's next-generation tactical weapons development plan, and at the same time is actually a deceptive name for an organization that uses Newtypes for military purposes. Participating members of the council were gathered from among the military, the government, and the munitions industry, and the testimony of some high-ranking officials, including General Revil, who actually knew the situation on the front lines, also supported this meeting. In addition, the largest shareholder of Harvick is listed as an advisor. The FSWS Development Headquarters, which was assembled after the start of Operation V, embarked on a full armor operation program for the RX-78 Gundam type mobile suit, in order to upgrade the already-developed Federal Army RX series mobile suits into even more powerful tactical weapons. The concept of "correct armament state" was actually an expanded interpretation of the core block system that was incorporated in the design and development of the RX series mobile suits. At this point, the search for human resources that could be used for development proceeded at a rapid pace, but the biggest problem was that the RX-78-2 specifications (one Part RX-78-1 specification) only 5 aircraft (However, RX-78-1 No. 4 was excluded because it was used for another plan). The overall balance of the RX-77 aircraft design is specialized for heavy armor, and the fact that it was already not as good as the 78 in maneuverability also slowed down the progress of the plan. In addition, the RGM-79 = GM (GUNDAM Mass Products) mass-produced mobile suit for hand-to-hand combat had a background of mass production due to strong push from the manufacturing company, so the RX-78 was lavished with increased prototypes. There was also a difference in qualities that could not be substituted for it, so much that it could not be compared. There are three main plans prepared for the implementation prototype of full armor operation as a practical weapon. Focusing on the fact that the operation situation is 100% outer space, the RX-78-3 type aircraft is the core, and the outer shell armor with some built-in guided weapons is added, and a long-range high-output beam cannon (on the outer shell) A corresponding generator is added), and a 420mm rocket cannon is also added as a fixed armament. Auxiliary propulsion is also added. Of course, optional weapons as Gundam can also be used together. It was given the model number FA-78-1, referring to the RX-78 in full armor. Also, in addition to the outer shell armor, the attack aircraft proposal with a large propulsion engine unit connected to the back (from the legs) is FA-78-303 (However, this aircraft number is not recorded in the official record, so this aircraft number is in the FSWS development department. ), and in the end, development progressed with the FA-78-400 type, which was equipped with a second hull unit equipped with four long-range guns equivalent to a large combat boat on the mounted FA-78. . In both cases, this plan was the result of planning to give a single mobile suit equipped with this special weapon an offensive power equivalent to that of a battleship or even more. With the mobility of the mobile suit, it was calculated that an attack without wasted bullets would be possible. However, the performance of the RX-78 Gundam-type mobile suit, which was the source of the funds, was calculated on the assumption that it would be operated by a Newtype pilot. The selection of second lieutenant Amuro Ray-class pilots, who were prominent even in the combined forces of both armies, took time, and it was only possible to temporarily organize an experimental unit from those who were relatively good at piloting mobile suits. Of course, the development of aircraft that could be used as decisive weapons at other military bases was also progressing within the Federation Forces, and the development of a dedicated aircraft that could be used by Second Lieutenant Ray was underway at ORGUSS Base in North America. Deployment was hastened as a next-generation high-performance mother machine. Regarding the existence of the FA-78 aircraft, it was generally regarded as a phantom plan due to the leak of some image data of the program that simulated actual combat after the war. Landing Ship), and in December UC0079, transmutation began in the Luna Two sector. However, these secret operations have not yet been publicly disclosed, probably because most of the recorded data within the Federation Forces has been erased. It is said that the plan envisaged the annihilation of the Zeon defense force around the lunar base Granada, but no official records of the actual battle have been discovered at this stage. However, eyewitness testimony has been left that the same head as the Gundam type was confirmed in a large gray Federation Forces attack aircraft that engaged a mobile suit similar to Zeong in the same sector.