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historical area of north Britain beyond Roman control, roughly corresponding to modern Scotland. It was inhabited by the tribe of Caledones (Calidones). The Romans first invaded the district under Agricola about AD 80 and later won a decisive battle at Mons Graupius. They established a legionary fortress at Inchtuthil (near Dunkeld, in Perth and Kinross district, Tayside region) as well as several auxiliary forts in strategic highland passes. But they were forced to evacuate Inchtuthil and all the sites north of the Earn River about AD 90 and all of Scotland during the rule of Trajan (AD 98-117).