Declassified images from Cold War spy satellites have revealed hundreds of previously undiscovered Roman forts in Iraq and Syria — and their existence suggests the eastern border of the ancient empire wasn’t as violent as initially thought, a new study finds.
Researchers already knew about a series of forts — spanning roughly 116,000 square miles (300,000 square kilometers) from the Tigris River in modern-day Iraq to the plains of the Euphrates River in Syria — that were once thought to belong to a north-south border wall that separated the Romans from the rival empire of Persia.