Romans in Scotland and The Battle of Mons Graupius

In AD 77, Roman forces under Agricola marched into the northern reaches of Britain to pacify the Caledonian tribesman. For seven years, the Romans campaigned across what is now Scotland. In AD 83, they fought the final battle at Mons Graupius, where 10,000 Caledonians were slaughtered with only 360 Roman dead.How much of this is true? The climax of the Agricola is the main source, a near contempo...