Subligaculum in the context of Loincloth

A hoplomachus (pl. hoplomachi) (hoplon meaning "equipment" in Greek) was a type of gladiator in ancient Rome, armed to resemble a Greek hoplite (soldier with heavy armor and helmet, a small, round, concave shield, a spear and a sword). The hoplomachus would wear a bronze helmet, a manica on his right arm, loincloth (subligaculum), heavy padding on his legs, and a pair of high greaves reaching to mid-thigh. His weapons were the spear and a short sword. He was often pitted against the murmillo (armed like a Roman soldier), perhaps as a re-enactment of Rome's wars in Greece and the Hellenistic East. The name hoplomachus means 'armored fighter'. The small, round shield was as much a weapon as a sword or spear, not unlike the original hoplites (who carried a larger shield), who used it primarily for defensive purposes, but also employed it in their charges, using it to ram their opponents at the onset of a fight. They wore no shoes so the sand would chafe their feet, presenting them a greater challenge.

His usual opponent was the murmillo, but he might fight the thraex in exceptional cases. Justus Lipsius conjectured that it was one of two designations of Samnite, and that Samnites were called hoplomachi when battling a Thracian, and a secutor when matched against retiarii.

A retiarius (plural retiarii; literally, "net-man" in Latin) was a Roman gladiator who fought with equipment styled on that of a fisherman: a weighted net (rete (3rd decl.), hence the name), a three-pointed trident (fuscina or tridens), and a dagger (pugio). The retiarius was lightly armoured, wearing an arm guard (manica) and a shoulder guard (galerus). Typically, his clothing consisted only of a loincloth (subligaculum) held in place by a wide belt, or of a short tunic with light padding. He wore no head protection or footwear.

The retiarius was routinely pitted against a heavily armed secutor. The net-fighter made up for his lack of protective gear by using his speed and agility to avoid his opponent's attacks and waiting for the opportunity to strike. He first tried to throw his net over his rival. If this succeeded, he attacked with his trident while his adversary was entangled. Another tactic was to ensnare his enemy's weapon in the net and pull it out of his grasp, leaving the opponent defenceless. Should the net miss or the secutor grab hold of it, the retiarius likely discarded the weapon, although he might try to collect it back for a second cast. Usually, the retiarius had to rely on his trident and dagger to finish the fight. The trident, as tall as a human being, permitted the gladiator to jab quickly, keep his distance, and easily cause bleeding. It was not a strong weapon, usually inflicting non-fatal wounds so that the fight could be prolonged for the sake of entertainment. The dagger was the retiarius's final backup should the trident be lost. It was reserved for when close combat or a straight wrestling match had to settle the bout. In some battles, a single retiarius faced two secutores simultaneously. For these situations, the lightly armoured gladiator was placed on a raised platform and given a supply of stones with which to repel his pursuers.