Many of Rome's advances in technology were due to the mighty Roman army. Engineers for the army built roads, bridges, and aqueducts. Doctors kept the troops healthy with medicine, and generals planned battles and sieges. Readers will learn how few civilizations before or since have influenced the known world as did the Roman Empire. Supports history-social science content standards mandating student understanding of the origins and influence of agricultural, technological, and commercial developments in key ancient civilizations. Broadens student understanding of the relationship among science, technology, and society by highlighting how major scientific and mathematical discoveries and technological innovations have affected societies throughout history.