an entrenching tool. Ligo Falx The falx was a curved blade that was sharp on the inside edge such as a sickle or a scythe. It was used to clear overgrowth. Torso armour Not all troops wore torso armour. Light infantry, especially in the early republic, wore little or no armour. This was both to allow swifter movement for light troops and also as a matter of cost. Legionary soldiers of the 1st and 2nd centuries used a variety of armour types. Some wore mail shirts, while others wore scale armour or lorica segmentata or laminated-strip cuirass. This last type was a complex piece of armour which in certain circumstances provided superior protection to the other types of Roman armour, mail armour (lorica hamata) and scale armour (lorica squamata). The testing of modern replicas has demonstrated that this kind of armour was impenetrable to most direct hits and missile strikes. It was, however, uncomfortable without padding: re-enactors have confirmed that wearing a padded undergarment known as a subarmalis relieves the wearer from bruising both from prolonged wear and from shock produced by weapon blows against the armour. It was also expensive to produce and difficult to maintain. In the 3rd century, the segmentata appears to have been dropped and troops are depicted wearing mail armour (mainly) or scale, the standard armour of the 2nd-century auxilia. The artistic record shows that most late soldiers wore metal armour, despite Vegetius' statement to the contrary. For example, illustrations in the Notitia show that the army's fabricae (arms factories) were producing mail armour at the end of the 4th century. Actual examples of both scale armour and quite large sections of mail have been recovered, at Trier and Weiler-La-Tour respectively, within 4th-century contexts. Officers generally seem to have worn bronze or iron cuirasses, as in the days of the principate, together with traditional pteruges. Lorica segmentata Lorica segmentata was a type of body armour primarily used in the early Roman Empire, but the Latin name was first used in the 16th century (the ancient form is unknown). The armour itself consisted of broad ferrous strips ('girth hoops') fastened to internal leather straps. The strips were arranged horizontally on the body, overlapping downwards, and they surrounded the torso in two halves, being fastened at the front and back by means of brass hooks, which were joined by leather laces. The upper body and shoulders were