Sienar-Jaemus Fleet Systems was a starship manufacturer that provided ships and equipment for the First Order. The company spawned from the infamous Sienar Fleet Systems, which produced ships for clients such as the governments of the Galactic Republic and the Galactic Empire. Their products included the TIE/fo and TIE/sf space superiority fighters, the latest models in the TIE line produced by the company's predecessor Sienar Fleet Systems, and the Upsilon-class command shuttle. The I-a4b solar ionization reactor, L-s9.6 laser cannon, and P-s6 twin ion engine that were used by the TIE/fo fighter were all produced by Sienar-Jaemus as well. The company also produced reactors, like the III-a1a primary hypermatter-annihilation reactor, used to power Resurgent-class Battlecruisers, and hyperdr