The Romans were different to the ancient British. They had come to conquer, and most of their people were soldiers. So their aim was to protect their troops, and they did this by building stockades – compact rings of stone or wooden walls with entrance gates.
Inside there were granaries (they still valued food above all else just like the British) and row after row of barracks, together with offices for administering the land they ruled. The British were not allowed to build fortifications of their own.
