Dacian culture presence in southeastern Transylvania is marked by discoveries such as the flagship hoard Sâncrăieni (Harghita county) or Dacian fortresses in Covasna county (Cetatea Zânelor) or Jigodin (Harghita county). Dacian Kingdom led by Decebal the Romanian ancestors, was taken after two wars, in 106 AD by the Roman Empire under the emperor Trajan, who began organizing the new Roman province of Dacia. Southeastern Transylvania was included in the provinces of Dacia Porolissensis, Dacia Apulensis and Meuse and fortified with numerous camps such as those at Inlăceni ( Praetoria Augusta) and Sânpaul (Harghita county) Breţcu (Angustia) and Oltenia (Covasna county) or Brâncoveneşti and Călugăreni (Mureș county). After the fall of Roman Dacia, the present-day territory of the Székely Land became part of the Thervingi kingdom "Gutthiuda". The migration of the Huns from the east pressured most of the German tribes to leave. In the Battle of Nedao the East Germanic Gepids defeated the Huns and founded Gepidia in the territory of present-day Transylvania. This marked the end of the Hunnic Empire. The medieval period The territory of the Székely Land was part of the Avar Khaganate. During this period, Avar and Slavic groups migrated into Transylvania. From around 900 to 1526 the area was under the direct control of the Hungarian state. The Székelys presumably settled in Transylvania in the 12th century from present day Bihar and Bihor counties. Ancient Hungarian legends suggest a connection between the Székelys and Attila's Huns. The origin of the Székely people is still debated. The Székely seats were the traditional self-governing territorial units of the Transylvanian Székelys during medieval times. (Saxons were also organised in seats.) The Seats were not part of the traditional Hungarian county system, and their inhabitants enjoyed a higher level of freedom (especially until the 18th century) than those living in the counties. From the 12th and 13th centuries, the Székely Land enjoyed a considerable but varying amount of autonomy, first as a part of the Kingdom of Hungary, then inside the Principality of Transylvania. The autonomy was largely due to the military service the Székely provided until the beginning of the 18th century. The medieval Székely Land was an alliance of the seven autonomous Székely seats of Udvarhely, Csík, Maros, Sepsi, Kézdi, Orbai and Aranyos. The number of seats later decreased to five, when Sepsi, Kézdi and Orbai seats were united into one territorial unit called Háromszék (literally Three