“A restatement of the primary evidence may therefore be helpful in understanding what the experience of having the Roman Empire on the doorstep may have meant for the early Caledonians. Firstly, no matter how it is framed, this was no mere interlude in Scottish history. The Roman Iron Age in Scotland spanned over 300 years of many recorded episodes of interaction, mostly violent, with one of the world's most powerful and expansionist empires. A third of a millenium that saw the presence of one of the highest concentrations of Roman military personnel - it has been estimated that at the height of occupation, at least one in eight Roman soldiers was serving in North Britain. The building of two great walls, the larger of which was maintained for a 300-year period and both with offensive and defensive characteristics of a magnitude not shared by any other Roman fronteir of its size. Unlike other zones of interaction, there is little evidence of regular trade and no manifestation of any meaningful civic development.” Roman EmpireCaledoniaRoman Britain Book:The Eagle and the Bear: A New History of Roman Scotland Source: The Eagle and the Bear: A New History of Roman Scotland