Roman Armor
Torso armor which was the last piece of complex armor which in certain circumstanses provided superior protection than other types of roman armor. But not all troops wore torso armor. Light troops, especially in the early Republic, wore little or no armour. This was both to allow swifter movement for light troops and as a matter of cost.
They used a thing called Lorica Segmentata which was primarly used in the early roman empire. The Lorica squamata was a type of scale armor used during the Republic and at later periods. It was made from small metal scales sewn to a fabric backing. The earliest evidence of the lorica segmentata being worn is around 9 BC. The armour was quite common in service until the 2nd century AD. The strips were arranged horizontally on the body, overlapping downwards, and they surrounded the torso. The last recorded use of this armour seems to have been from the last quarter of the 3rd century AD.
They also used a thing called Lorica Hamata which was a type of chain mail armor used during the roman republic through the roman empire. It was made from small metal scales sewn to a fabric backing. The individual scales were either iron or bronze. They could also be made out of tin as well. The metal was generally not very thick because since the scales overlapped in every direction, but the multiple layers gave good protection. Many have rounded bottoms, while some are pointed or have flat bottoms with the corners clipped off at an angle. The scales were wired together in horizontal rows that were then laced or sewn to the backing.