During the Late Middle Ages, plate armour was expensive and tailor-made for the wearer. Consequently, it was generally reserved for nobility. During the English Civil War, a cuirassier's armour could weigh between 32 and 45 kilograms (71 and 99 lb), making this form of armour prohibitively costly and heavy. For these reasons, full plate armour started to disappear during the first few years of the conflict. Early Modern warfare was characterized by the establishment of standing armies equipped with mass-produced ordnance weapons.
Munition armour was of a standard pattern with interchangeable pieces. It was often made of iron or sometimes an alloy of iron containing a small amount of phosphorus, which gave a marginal increase in hardness. The phosphorus content may have been due to the use of high-phosphorus ores or the use of coal in smithing.
In Japan, the warfare of the Sengoku period (15th and 16th centuries) required large quantities of armour to be produced for the ever growing armies of foot soldiers (ashigaru). Simple munition quality (okashi or lent) cuirasses (dō) and helmets (kabuto) were mass-produced including foldable suits, like tatami armour.Tatami armour was made from small iron or leather plates that were usually connected to each other by mail.
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- The Watanabe Art Museum Samurai Armour Collection Volume I — Kabuto & Mengu, Trevor Absolon P.130
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