UAE Systems

United Aerospace Systems is the largest defence contracter in human space, providing the majority of arms, AFVs and air vehicles for the UNSC. UAE Systems was formed in the wake of the Interplanetary from numerous aerospace, weapon, electronic, defence contractors and other military companies. Many european companies were being pushed to bankrupcy by the larger american companies who held much of the favour with the UNSC. To combat this massive drop in sales, British Aerospace Systems began a massive unification of European Defence contractors. In the end, UAE Systems, as it became known, was made from BAE Systems, AugustaWestland, Accuracy International, Royal Ordnance, Saab, a reunified Bofors, Thales, Heckler and Koch, Krauss-Maffei Wegmann, Rheinmetall, Swiss Arms, Panavia, Steyr, Benelli, Beretta, Fabrique National, RPC Fort, Mikoyan, Ilyushin, Irkut, Tupolev, Yakovlev, many of the Russian weapon developers, EADS, Finmeccanica, Dassault Aviation, and MBDA. 
This new super Company, which later absorbed Denel Corporation and NORNICO, was easily the largest and most powerful company in UNSC space, to date. Even the late formed UNADS failed to challenge the company. While in Weapons development, Weapons production, production of light vehicles and ship building, it comes a clean second place, in both the creation of armoured fighting vehicles, aerospace manufacturing, missile and rocket production and warfare systems development its a clear first, dominating the market both commercially, privately and on contract to the UNSC. It was also one of the few companies that evaded the 'innie witch hunts' that almost ruined Trinity Arms, UNADS and WST, mostly in due to to them keeping their nose clean of the buisness. 
By the time of the Human-Covenant War they were a major arms manufactuer, supplying the popular BR55 and BR55HB SR, the infamous Pelican Dropship, the standard marine body armour and the Shortsword Bomber, among many other, numerous addittions to the UNSC Arsenal. This kept them in pocket for the majority of the war and ensured their survival after it. During the period on the Necros War they greatly increased their supply of vehicles to the UNSC, producing many armoured vehicles, along with the experimental Dragon, Wolf and Ogre vehicles, new aircraft, weapons, electronic systems and missiles.