The Roman camp has replicas of two Roman war machines. The Roman military used these machines during occupations of fortified towns and other defences. These are so-called torsion machines. Power is provided by the torsion springs of twisted rope. The Romans took this construction principle from the Greeks who are thought to have invented it.

The park has Northern Europe’s largest two-tonne replica catapult – Onager. Machines such as this were built for occupation and large battles. The park shows this heavy machine in action every day.

The park also has the world’s only full-size replica of a Hatra Ballista. This is a spear catapult weighing 1.5 tons which was found by the town of Hatra in ancient Iraq.