My last comment on bronze/iron swords, from wikipedia (sorry for clogging the thread:) Ancient greek (late), roman and germanic swords were iron, not bronze. Viking swords were iron/steel:
With the spread of the La Tene culture at the 5th century BC, iron swords had completely replaced bronze all over Europe. These swords eventually evolved into, among others, the Roman gladiusand spatha, and the Greek xiphos and the Germanic sword of the Roman Iron Age, which evolved into the Viking sword in the 8th century
Bronze Age swords appear from around the 17th century BC, in the Black Sea region and the Aegean, evolving out of the dagger. They are replaced by the Iron Age sword during the early part of the 1st millennium BC.