Ankara headquarters of the Turkish Aerospace Industries, MKE, ASELSAN, Havelsan, Roketsan, FNSS, Nurol Makina, and numerous other firms are located. Exports to foreign countries from these defence and aerospace firms have steadily increased in the past decades. The IDEF in Ankara is one of the largest international expositions of the global arms industry. A number of the global automotive companies also have production facilities in Ankara, such as the German bus and truck manufacturer MAN SE. Ankara hosts the OSTIM Industrial Zone, Turkey's largest industrial park. A large percentage of the complicated employment in Ankara is provided by the state institutions;
History of Ankara form of "Ankara". In 278 BC, the city, along with the rest of central Anatolia, was occupied by the Celtic speaking Galatians, who were the first to make Ankara one of their main tribal centres, the headquarters of the Tectosage tribe. Other centres were Pessinos, modern Balhisar, for the Trocmi tribe; and "Tavium", to the east of Ankara, for the Tolstibogii tribe. The city was then known as Ancyra. The Celtic element was probably relatively small in numbers; a warrior aristocracy which ruled over Phrygian-speaking peasants. However, the Celtic language continued to spoken in Galatia for many centuries. At the