 Only twenty years after Hadrian's Wall was started, Antoninus Pius (emperor 138 AD – 161 AD) almost completely abandoned it in 138 AD, a few months after his accession, turning his attentions to his own frontier fortification, the Antonine Wall across central Scotland.Perhaps he wanted to include possible enemies (and friends) within a frontier zone, rather than beyond it, as with Hadrian's scheme.The two walls were not held in conjunction and the coastal fortifications were de-militarised as well.