sentences:  Constructed in the 70CE or 80CE, it was superseded by the later Hadrian's Wall forty years later and then the final Antonine Wall twenty years after that.Rather than representing a series of consecutive advancements, the border should be seen as fluctuating - the Antonine Wall for example was built between 142 and 144, abandoned by 164 and briefly re-occupied in 208.Although records are scarce, there are indications that the border fluctuated between the various fortifications depending on the local strength of the military.