The garrisons of these camps protected the Pannonian provinces against attacks from the north from the time of Augustus (31 BC–14 AD) to the beginning of the 5th century.
[1] Pannonia Superior consists mainly of present-day states of Austria, Croatia, Hungary, Slovakia, and Slovenia, while Pannonia Inferior consists of present-day states of Hungary, Croatia, Serbia, and Bosnia and Herzegovina.
The Danubian limes was one of the most turbulent regions in the European part of the Roman Empire and, during more than 400 years of Roman rule, Pannonia was one of its most important provinces, especially after the abandonment of Dacia Traiana in 271 AD, because from that point on, the pressure of migrating peoples on this section of the limes increased still further.
The limes also had a great influence on the economic and cultural life of the civilian population because its hinterland was one of the main supply areas for the border troops and these in turn were the guarantors of the rapid Romanisation of the province.
[2] The majority of the occupying forces were stationed in camps (castra), small forts (castella), watchtowers, burgi and fortified bridgeheads that were built at regular intervals along the riverbank.