In addition, the Earth Federation Forces started a G-4 project which consist of four RX-78s for each of its branches, and EFSF (Earth Federation Space Force) used information of the RX-78-4 to develop the RX-78NT-1. According to the director's production notes of "", it could be considered to be the 9th unit of RX-78, initially intended to be used by Amuro Ray. Although what unit the EFAF (EF Air Force) developed is not specifically mentioned, in the semi-canon manga "Mobile Suit Gundam: MS Generation" the EFAF created the RX-78E (GT FOUR/Gundam Transformer/Flight & Operations Unifications Reactors), which is different from the eight RX-78s produced. Another unit is the EFGF's (EF Ground Force) RX-78XX, which uses scrap parts of the RX-78s, just like the RX-79 Gundam Ground Combat Type. The EFN (EF Navy) developed the RAG-79-G1 as the G-4 project's marine type Gundam, yet it is only an upgrade of the RAG-79 Aqua GM for Ace pilots with just the head and generator changed. After the One Year War, the GP series are numbered after the RX-78 convention, despite being newly produced units.