Prehistoric art in Scotland Firth. The Romans eventually withdrew to a line in what is now northern England, building the fortification known as Hadrian's Wall from coast to coast. Around 141 CE they undertook a reoccupation of southern Scotland, moving up to construct a new "limes" between the Firth of Forth and the Firth of Clyde, where they built the fortification known as the Antonine Wall. The wall was overrun and abandoned soon after 160 and the Romans withdrew back to the line of Hadrian's Wall, until Roman authority collapsed in the early fifth century. The Antonine Wall and its associated forts left a
Newcastle town wall town wall was constructed during the 13th and 14th centuries to repel Scottish invaders. Newcastle is about from the River Tweed, which marks the border between England and Scotland, as it did then. At that time there was a power struggle between England and Scotland, that eventually led to the Wars of Scottish Independence. The Scottish kings were always ready to take advantage of any weakness in the English rule to invade the North of England. An example of this is David I of Scotland, who took advantage of the civil war between Stephen and Matilda to invade Northumberland in