As far as a military use knife, you want one for every type of enviornment. When "Use and Abuse" is the name of the game, you want to use a cheap yet strong knife. Cheap so that if it gets damaged or lost and strong because you depend on it. Fortunately those types of steel fit both catagories. I usually look for something like 1095 carbon or for a good stainless like 440A or AUS6A. If price isn't a big factor, I've heard good things about D2. Such as the R.A.T. knives. I like the steels with the lower Rc hardness for military use. They will tend to bend before they break. Such is the case of an Ontario Pilot Survival knife that I carried in the Army. It once bent at the handle and I was able to bend it back into shape.