Oliver:
If you're in the military and want a knife to carry into combat, you ought to say so. You also might want to indicate if you are over 18 (years).
When you say "It will be used on living humans," that sounds like you're planning something unpleasant and highly illegal. I've never actually heard anyone express "self defense" in quite that way.
At the risk of unintentionally becoming your accomplice: The CAK model to which you refer is a heavy duty chopper, not a fighting blade, although any sharp chunk of steel can "kill enemies," as you put it, and any HI model can "chop wood" to one degree or another. Have you considered a large kitchen knife? As I recall, that was used effectively in the Hitchcock movie, "Psycho."