Crime scene forensics used to recreate British hillfort siege
Although attempts had previously been made to invade and colonise northern Britain, emperor Hadrian had settled for dividing the islands with a wall.His successor in 138AD, Antonius Pius came to power without any military victories to his name and decided to make his mark in what is now Scotland.Just two years later a 5,000-strong army marched north towards the indigenous stronghold of Burnswark Hill where they created siege camps on either side.About 3,000 locals were either living - or had taken refuge - within the hillfort's palisade defences.Dr John Reid of the Trimontium Trust said: "Antonius Pius sends his Legate - or senior general in Britain - to take Caledonia for him and for Rome."The first thing they hit when coming from Hadrian's Wall is Burnswark Hill."
The results of an archaeological survey of the site a decade ago were added to previous data and finds from studies which took place in the 1890s, 1920s and 1960s.By using drones, the Trimontium Trust was able create an accurate 3D terrain model of the Roman camps and the hillfort.Forensic ballistics pinpointed the angles of attack and mapping allowed precision detailing on the recreation down to a 2cm (0.8in) pebble within the site.For over a year the archaeologists worked with digital artist Robert Gapper of Virtual Histories to build the 3D walkthrough.Prof Campbell added: "One of the advantages of Burnswark is that there is so much still on the ground to start with."Because it is such an unique site, we've been able to drop people, buildings and weapons - in their appropriate styles - into where they would have been to create this overview."
Featuring more than 8,000 individual characters, the 3D digital reconstruction relives the moments before the Roman army stormed the hillfort.Visitors to the Trimontium Museum in Melrose can now use headsets for a virtual walkthrough of the unfolding drama.Dr Reid added: "We know missiles were shot in showers and did some serious damage - they were travelling at speeds of up to 70 metres per second."Then there were arrows from Syrian archers, and ballista balls - the size of grapefruits - being shot from the three platforms, and finally the sling bullets, which were anti-personnel weapons to take arms, legs and heads off."Then from the main camp there would have been a rapid outpouring of infantry heading straight up to the summit to breakthrough the defences."They quickly broke through and - from evidence - herded the last of the resistance to the west end of the hill."
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