For over 3000 years, Ancient Egypt was the world's most vibrant and puzzling civilisation. It flourished through war and peace. The Egyptians built great cities, enduring monuments, and advanced mathematics and technology. Their astonishing legacy survives to this day. This four-part series looks at what transformed a simple community of riverside farmers into a great empire, outlasting all others. Archaeologists have uncovered new clues from Egypt's very beginning, a 5000-year-old tablet that tells a fascinating tale of warfare just before the founding of the empire.