Most people interested in ancient weapons know that early iron swords were not any better than bronze ones. But they don’t always know where the idea comes from, or how we know about the properties of early edged weapons. If you want to find out, the article is available in Ancient Warfare XI.6 (The Decelean War) from Karwansaray.
But in a little magazine article, I was not able to include all the references which I wanted. So what if you want to learn more?