More than 2,000 years ago, the Roman army swept across Europe, northern Africa, and the Middle East. Backed by the legions, their military, and engineering skills, the Romans built one of the largest empires in history, dominating as many as 36 modern nations. Technology helped shape the ancient world and reverberates in our Western lifestyle and amenities today. But the Roman legacy is less about invention itself than about the spreading of the ancient technology. Rather than invent most of what they became famous for, the Romans adopted, perfected, and spread their enemies' inventions throughout their empire.