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Reconstruction of a Roman legionary
Reconstruction of a Roman auxilia 175 AD from a northern province

The lorica hamata is a type of mail armour used by soldiers for over 600 years (3rd century BC to 4th century AD) from the Roman Republic to the Roman Empire. Lorica hamata comes from the Latin hamatus (hooked) from hamus which means "hook", as the rings hook into one another.

It was issued to both primary legionary and secondary auxilia troops and was mostly manufactured out of bronze[1] or iron. It comprised alternating rows of closed washer-like rings punched from iron sheets and rows of riveted rings made from drawn wire that ran horizontally, producing very flexible, reliable and strong armour. Each ring had an inside diameter of about 5 mm, and an outside diameter of about 7 mm.[citation needed] A standard lorica hamata weighed around 11kg, though this would vary depending on the design and the materials used.

The Romans' knowledge of mail manufacture may have come from 3rd century BC conflicts with the Celts,[2] though the first documented use occurred during the Roman conquest of Hispania. There were several versions of this type of armour, specialized for different military duties such as skirmishers, cavalry[3] and spearmen.

The shoulders of the lorica hamata had flaps that were similar to the Greek linothorax which ran from about mid-back to the front of the torso, and were connected by brass or iron hooks which connected to studs riveted through the ends of the flaps. Up to 30,000 rings went into one lorica hamata, and the estimated production time was two months, even with continual slave labor at the state-run armouries.

Although labor-intensive to manufacture, it is thought that, with good maintenance, the armour could be used for several decades.

Over its lifetime, lorica hamata remained in constant use by legionaries and it was the preferred armour of centurions,[citation needed] who favored its greater coverage and lower maintenance. Constant friction kept the rings of the lorica hamata free of rust,[citation needed] unlike the lorica segmentata, which needed constant maintenance to prevent corrosion.

During the 1st century AD it was starting to be supplemented by lorica segmentata, but had been reintroduced as sole standard-issue armour by the 4th century.[citation needed] The lorica hamata was still common among the legionary soldiers in the 2nd century, despite the use of the more popularly recognized lorica segmentata segmented plate armour. Lorica segmentata was eventually put out of use in the early 4th century for unknown reasons, but lorica hamata remained common for both legionaries and auxiliaries. Later versions had sleeves and covered the legs to the knees.

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