The Art of War: The Chinese approach to warfare 2205 BCE – 280 CE is a source book for Warhammer Ancient Battles. China has the longest continuous civilisation in history and was finally unified by the First Emperor in 221 BCE. The Warring States period was over, and Qin victorious! Yet only 16 years later, the Qin Dynasty was in turmoil, the Emperor dead and all that would remain of his legacy would be the silent warriors of Xian - the Terracotta army.