I noticed something that's a little, not quite right.
In the civilopedia for the Doric swordsman it says, "They were so succesful against Greek armies because the Dorians had access to iron, which was stronger than the Bronze weapons available to the Greeks."
In actuality, the Greeks had access to iron as well. They just didn't use it much. It is one of the most abundant metals in the world. At the time, it was nearly valueless; tin, used to make bronze, was on the other hand, extremely expensive and difficult to obtain. The products of early ironworking technology were actually inferior to bronze and the only people who used it, did so because they couldn't get their hands on any tin. It wasn't until much later that several centres of advanced ironworking (e.g. Noricum) emerged in Europe that were producing iron goods that were equal to or better than bronze. It took alot of refinement in the smithing techniques before iron was much good. Bronze, on the other hand, is very simple to smith and does not require complicated techniques like pattern-welding or quench hardening to make it suitable for use in weapons and tools. Iron is actually very soft and flexible in its natural state. The early ironmakers increased the carbon content, but not in a controlled way; the more carbon, the harder iron is, but it also becomes brittle. It took many centuries for iron techniques to be refined to achieve an equilibrium between soft but flexible and hard but brittle. The Doric invasion happens at a time long before iron techniques have achieved superiority over bronze.
The more likely reason the Dorics were so succesful was not iron, but the style of their swords, the same reason Brennus enjoyed such success. Greek swords of this period tend to be less well designed than their counterparts elsewhere. Note that this is before the development of the phalanx, and Greek warfare at this time tended to consist of much more primitive methods; small skirmishing bands raiding farmland, that sort of thing.