▁cons olid ate ▁the ▁Roman ▁presence ▁in ▁Scotland ▁in ▁the ▁after math ▁of ▁M ons ▁Gra up ius , ▁were ▁abandoned ▁within ▁the ▁space ▁of ▁a ▁few ▁years . ▁It ▁is ▁equally ▁likely ▁that ▁the ▁costs ▁of ▁a ▁drawn - out ▁war ▁out we ighed ▁any ▁economic ▁or ▁political ▁benefit ▁and ▁it ▁was ▁more ▁prof itable ▁to ▁leave ▁the ▁C aled oni ans ▁alone ▁and ▁only ▁under ▁de ▁j ure ▁submission . ▁ ▁With ▁the ▁decl ine ▁of ▁imperial ▁amb itions ▁in ▁Scotland ▁( and ▁Ireland ) ▁by ▁ 8 7 ▁AD ▁( the ▁withdraw al ▁of ▁the ▁XX ▁leg ion ), ▁cons olid ation ▁based ▁on ▁the ▁line ▁of ▁the ▁Stan eg ate ▁road ▁( between ▁Carl is le ▁and ▁Cor bridge ) ▁was ▁settled ▁upon . ▁Carl is le ▁was ▁the ▁seat ▁of ▁a ▁' cent ur io ▁region arius ' ▁( or ▁' d istrict ▁commission er '). ▁When ▁the ▁Stan eg ate ▁became ▁the ▁new ▁front ier ▁it ▁was ▁augment ed ▁by ▁large ▁for ts ▁as ▁at ▁V ind ol anda ▁and ▁additional ▁for ts ▁at ▁half - day ▁march ing ▁intervals ▁were ▁built ▁at ▁New br ough , ▁Mag nis ▁( Car vor an ) ▁and ▁Br am pton ▁Old ▁Church . ▁▁▁ ▁The ▁years ▁ 8 7 - 1 1 7 ▁were ▁of ▁cons olid ation ▁and ▁only ▁a ▁few ▁sites ▁north ▁of ▁the ▁Stan eg ate ▁line ▁were ▁maintained , ▁while ▁the ▁signs ▁are ▁that ▁an ▁order ly ▁withdraw al ▁to ▁the ▁Sol way - Ty