Roman army of the mid-Republic to the charge followed by close melee combat, had no effective response. Nevertheless, in the years following Cannae (216-203 BC), the record of Roman cavalry in operations against Hannibal in southern Italy was creditable, scoring a number of successes in cavalry encounters although never depriving the enemy of overall cavalry superiority. The Romans finally succeeded in closing the light cavalry gap with the Carthaginians by winning over the Numidian king Massinissa, previously an ally of Carthage. This enabled the Romans to field at least an equal number of Numidians at the battle of Zama (202 BC), who, outnumbering the Roman/Italian
Sanitation in ancient Rome sanitation artifacts of the ancient world. Most sources believe it was built during the reign of the three Etruscan kings in the sixth century BC. This "greatest sewer" of Rome was originally built to drain the low-lying land around the Forum. It is not known how effective the sewers were, especially in removing excrement. From very early times the Romans, in imitation of the Etruscans, built underground channels to drain rainwater that might otherwise wash away precious topsoil, used ditches to drain swamps (such as the Pontine Marshes), and dug subterranean channels to drain marshy areas. Over time, the Romans