Roman Cumbria to Wallsend on the Tyne estuary, with additional military installations running down the Cumbrian coast from Bowness to Risehow, south of Maryport, in an integrated fashion (and with forts at Burrow Walls and Moresby that were perhaps not part of the system). Historians believe that the Turf Wall from the River Irthing to Bowness-on Solway was rebuilt in stone in two stages. The most easterly five miles were rebuilt at the time of Hadrian, with the remainder being rebuilt after 150 AD. However, this is open to dispute: it is uncertain whether the building works in the second half of
Limes Britannicus were built to protect Rome’s territorial claims. From 122, the northern border was secured by Hadrian's Wall. The fortifications on the coast of Cumbria, which were erected later, were intended to prevent the Wall being circumvented in the West. Under Hadrian, the three legion camps were rebuilt in stone. In 140 AD, Roman troops advanced again against the Caledonians and built the Antonine Wall further to the north but, by 160, it had been abandoned. In the period 155-158 AD there was a revolt in Britain which led to heavy losses being inflicted on the local legions. These losses had