The Excavations:

The fort defences

How was the fort defended?
The main defence was the rampart (called the vallum). The rampart was 6m wide at the base and 5m high. Sentries would patrol a walkway along the top of the ramparts. Outside the rampart a deep v-shaped ditch provided another layer of defence against attack.

Gateways into the fort
The army controlled access to the fort through gateways in each side of the fort. Only one gateway of the four gateways into the fort was found and excavated at Castleford. This was the gateway that led from the fort into the annexe.