5th century BC, iron swords had completely replaced bronze all over Europe. These swords eventually evolved into, among others, the Roman gladius and spatha, and the Greek xiphos and the Germanic sword of the Roman Iron Age, which evolved into the Viking sword in the 8th century. There are two kinds of Celtic sword. The most common is the "long" sword, which usually has a stylised anthropomorphic hilt made from organic material, such as wood, bone, or horn. These swords also usually had an iron plate in front of the guard that was shaped to match the scabbard mouth. The second type is a "short" sword with either an abstract or a true anthropomorphic hilt of copper alloy. Scabbards were generally made from two plates of iron, and suspended from a belt made of iron links. Some scabbards had front plates of bronze rather than iron. This was more common on Insular examples than elsewhere; only a very few Continental examples are known. Steppe cultures Swords with ring-shaped pommels were popular among the Sarmatians from the 2nd century BC to the 2nd century AD. They were about 50–60 cm in length, with a rarer "long" type in excess of 70 cm, in exceptional cases as long as 130 cm. A semi-precious stone was sometimes set in the pommel ring. These swords are found in great quantities in the Black Sea region and the Hungarian plain. They are similar to the akinakes used by the Persians and other Iranian peoples. The pommel ring probably evolves by closing the earlier arc-shaped pommel hilt which evolves out of the antenna type around the 4th century BC. Stability Polybius (2.33) reports that the Gauls at the Battle of Telamon (224 BC) had inferior iron swords which bent at the first stroke and had to be straightened with the foot against the ground. Plutarch, in his life of Marcus Furius Camillus, likewise reports on the inferiority of Gaulish iron, making the same claim that their swords bent easily. These reports have puzzled some historians, since by that time the Celts had a centuries long tradition of iron workmanship. In 1906 a scholar suggested that the Greek observers misunderstood ritual acts of sword-bending, which may have served to "decommission" the weapon. Such bent swords have been found among deposits of objects presumably dedicated for sacred purposes. The speculation has been repeated since. Radomir Pleiner, however, argues