region which would later become famous for producing Noric steel, the highest quality available for armor and weaponry in the Roman Empire. Celts were renowned for their ability to make swords of both bronze and iron. Swords were too expensive for many common soldiers so they fought with a spear, javelins or slings instead. Infantry and cavalry Tacitus wrote that the strength of the Celts lies in their infantry which proved true in many of the early encounters and engagements between the Celts and their Greco-Roman contemporaries. While Celtic Infantry tactics and equipment varied greatly from group to group, they did have some core commonalities. The average Celtic warrior was equipped with javelins, a spear or sword for the wealthier and a body shield. While it might initially appear from Classical sources such as Polybius, that the equipment of the Celts as a whole was relatively simple and generally inferior. The truth is far more complex, as the adoption of Celtic equipment and technology by many of their Classical contemporaries after engagements with the Celts presents a different picture. Celtic arms and armor were in fact highly advanced, as the Celts were renowned master Iron workers in the Halstatt, La Tene cultures and in the province of Noricum. The Celts were described by classical writers such as Livy and Florus as fighting as hordes like "wild beasts". Julius Caesar contradicts these sources in his descriptions of battles against Gallic tribes in Commentaries on the Gallic Wars. Caesar speaks of continental Celts fighting in an organized fashion, even forming a Phalanx or Testudo like formation as defense against advancing cavalry. This heavily contrasts the enduring image of the unorganized naked Celtic barbarian as depicted by other Greco-Roman sources. Following the Celtic invasion of Greece in the 3rd century BC, the proliferation of elements of Celtic styles of weaponry and equipment had spread both far and wide such as chainmail style armor, the Montefortino, Coolus and Aden style helmets, thureos style body shields, the gladius and spatha style swords. Even though Celtic peoples had access to iron swords and armor, it was only available to a select few within Celtic society. So aside from the King, Chief and wealthy nobility, body armor was rare. With most warriors wearing colorful cloaks or tunics, shirts, pants although some may have stripped to the waist for battle and in some instances wore nothing at all