Dacian Limes

[2] Most of the frontier was located along the Carpathians and other mountain chains with few passes suitable for armies, and the rest by the lower courses of the Mureş, Tisza and Olt (Alutus) rivers.

Generally the major forts of the limes were built in valleys while the nearby higher land was controlled from watch towers for example on a 42 km line south-west of Porolissum.

[4] Defence of Dacia was centred on two points: in the eastern half on the fort at (Angustia) (Breţcu) which controlled the vulnerable Oituz Pass, and in the west on Porolissum.

The organisation of the province proceeded quickly under its first governor, Decimus Terentius Scaurianus, as shown by coins minted in 112 bearing the inscription DACIA AUGUSTI PROVINCIA.

The empire's European provinces had fortified boundaries (limes) on which military units were deployed along rivers (the Rhine and the Danube) or on defensive earthworks.