Everyone has heard of the Great Wall of China and knows of Hadrian's Wall and the other barriers lining stretches of Rome's imperial frontiers. But Peter Spring
The most famous example of fortification in the world, the Great Wall of China stretches for more than 6,000km across inhospitable terrain. Charting its develop
Which ancient army boasted the largest fortifications, and how did the competitive build-up of military capabilities shape world history? Few realise that imper