Someone might object that it's not entirely relevant to Twilight but Jester reminded me that it might well be. Therefore I post an interesting site on the Italian Arditi of WWI.
http://www.worldwar1.com/itafront/arditi.htm
In a twilight setting such type of warfare might become useful again and I wouldn't be surprise to find again middle ages type weapons and armors as in WWI. If anyone has something on this, I'll be most interested.
As modern bodyarmor become rare, troops might rely on old types of body armor suits. Moreover, a mace or a battle axe is a scary weapon in close combat even when you are facing it with modern rifle. As Jester said, especially when you are taken by surprise.