The occupation of the present Austria began in the year 15 BC. First was occupied the area west of the Inn (Tirol and Voralberg).

The remaining region (Regnum Noricum) was used at the latest from the year of AD 6 for a campaign against the Markomanni. For that was the hospitium publicum (governmental hospitality contract) from the year 170 BC certainly usefully. The people had already adopted a part of roman life style.

The province Noricum was appointed however presumable under Tiberius Claudius Nero Germanicus (Claudius) (AD 41 - 54). In Austria were the provinces Raetia, Noricum and Ponnonia Superior. In the late antiquity the provinces were subdivided again.

The northern boundary ran along the Danube. At the beginning was a continuous military crew obviously in Carnuntum. Under the flavian emperors the boundary was reinforced. Along the Danube troop camps were constructed in the timber-turf-technique. From the year AD 190 - to the part also formerly - the forts were altered in stone. When the limes street - combination street of the forts along the Danube - was built is not known to me.

Against the end of the 1st century AD the construction of the legion camp in Vindobona (Vienna) began. The legion camp in Lauriacum (Enns) was constructed after the year 180.

Smaller junctions and mouth of rivers were protected with burgi (turrets). They were constructed presumably after the year 180.

With the reorganization of the army which began around the middle of the 3rd century the boundary crew decreased. In the forts smaller remaining troops - the limitanei - were stationed, the rest of thy army were mobile field troops (comitatenses). In a short time from the middle of the 3rd century - as which vici (camp villages) before the forts still were habitable - the soldiers were allowed to live in the vici. After that the soldiers withdrew into a corner section of the forts. The rest was used for the civilian population.

In the first two centuries the boundary should represent a power demonstration against the barbarians in the north and a customs frontier. After the wars against the Markomanni the boundary was reinforced massively.

The boundary was overrun repeatedly: From the year 167 through the Markommanni. The situation was cleared  only to the death of Marcus Aureulius Antoninus or rather through Lucius Aelius Aurelius Commodus. Around the year 233 Alemannians raids occurred in Reatia and Germania. Between 289 and 294 the Sarmants ran against Pannonia. To the middle of the 4th century the raids increased in Pannonia.

After the defeat of Valens in the year 378 at Adrianopel parts of the eastern Goths and Alans had to be settled in the province Pannonia. In 401 the vandals moved along the Danube to west. In 405 the eastern Goths crossed parts of the present Austria on the way to south. In 407 the Westgots under Alarich settled in parts of Noricum before the march down to south.

In AD 433 the province Pannonia was given up to the Huns. In AD 460 the holy Severin arrived in Noricum. He tried to protect the Roman population. In AD 488 organized Hunwulf, the brother of Odoaker, the withdrawal of the remained Romans (if they wanted) to Italy. This was the end of the roman Austria.

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