Thracian warfare In the 4th century BC, both infantry and cavalry troops started wearing helmets (some of leather) and some peltasts are seen with greaves. Principal weapons in the 4th century BC (as well as earlier) were the spear and short knife. Armor, when it was available (for the nobility), was at first leather or bronze but iron armour started appearing in the 4th century BC. Thracian cavalry would wear leather armor or no armor and would be armed with javelins, a bow, or a spear. Only royal cavalry would wear armor. Oval shields and peltes (even by heavy cavalry) were later
Greek units of measurement Greek units of measurement A number of units of measurement were used in Greece to measure length, mass, area, and capacity. In Greece, the metric system has been used since 1836 and was made compulsory in 1922. One "piki" varied from 0.640 m to 0.670 m. 1 "pic" was equal to 1 piki. The "small piki" of Constantinople (also known as the "endeze") was equal to 0.648 m The "large piki" of Constantinople (also known as the "arsin") was equal to 0.669 m A masonry "piki" (also known as the "meimar zire") was equal to 0.750 m. Two types of