I was told by a historial fencing instructor that early swords in European History were not sharp as we commonly believe, only the tip for thrusting. According to him, the technology and materials used in the forging process didn't allow the swords to remain sharp.
It makes sense to me - I've seen some cutting videos with blunt heavy swords and just the weight of those things is enough to cause lethal damage. Even in Bullshido I've read something about this, but I've also been told the opposite, "swords were always as sharp as they could".
Can anyone give me some light?