Engines of Empire explores the advanced hydraulic technologies that powered ancient civilizations across Europe, Asia, and the Middle East. The book examines how engineers in Rome, Egypt, Persia, China, and other cultures designed aqueducts, waterwheels, irrigation systems, fountains, and temple mechanisms that transformed water into motion, energy, and political authority. Through clear explanations and well-documented historical examples, the book highlights the ingenuity behind these systems and their impact on urban development, religious practices, agriculture, and imperial control. This work provides readers with an accessible overview of ancient hydraulic engineering and its role in shaping the growth and success of early civilizations.