The scutum (; plural scuta) was a type of shield used among Italic peoples in antiquity, most notably by the army of ancient Rome starting about the fourth century BC. The Romans adopted it when they switched from the military formation of the hoplite phalanx of the Greeks to the formation with maniples (). In the former, the soldiers carried a round shield, which the Romans called a clipeus. In the latter, they used the scutum, which was larger. Originally it was oblong and convex, but by the first century BC it had developed into the rectangular, semi-cylindrical shield that is popularly associated with the scutum in modern times. This was not the only kind the Romans used; Roman shields were of varying types depending on the role of the soldier who carried it. Oval, circular and rectangular shapes were used throughout Roman history. History The first depictions of the scutum are by the Este culture in the 8th century bc, and subsequently spread to the Italians, Illyrians, and Celts. In the early days of ancient Rome (from the late regal period to the first part of the early republican period) Roman soldiers wore clipeus, which were like the (), smaller (than the scutum) round shields used in the Greek hoplite phalanx. The hoplites were heavy infantrymen who originally wore bronze shields and helmets. The phalanx was a compact, rectangular mass military formation. The soldiers lined up in very tight ranks in a formation that was eight lines deep. The phalanx advanced in unison, which encouraged cohesion among the troops. It formed a shield wall and a mass of spears pointing towards the enemy. Its compactness provided a thrusting force that had a great impact on the enemy and made frontal assaults against it very difficult. However, it worked only if the soldiers kept the formation tight and had the discipline needed to keep its compactness in the thick of the battle. It was a rigid form of fighting and its maneuverability was limited. The small shields provided less protection. However, their smaller size afforded more mobility. Their round shape enabled the soldiers to interlock them to hold the line together. Sometime in the early fourth century BC, the Romans changed their military tactics from the hoplite phalanx to the manipular formation, which was much more flexible. This involved a change in military equipment. The scutum replaced the clipeus. Some