In the above posts, it appears many use the terms "fighting" and "combat" interchangeably where techincally they should not be. A "combat" knife is the tool of a soldier. Soldiers used combat knives to open boxes, cut aiming stakes for machineguns, cut plastic sheeting or other fabrics, open MRE's, open cans, cut equipment away from dead enemy soldiers, dig, probe for mines, etc. A "fighting" knife is specialized weapon for eliminating the enemy. Most soldiers would not carry a "fighting" knife because a "combat" knife would be more utilitarian, but many soldiers don't understand these concepts very well until after their first deployment. Combat knives are rarely used for fighting, but although fighting knives are not very appropriate for field craft those who own them often press them into such service. I will leave it to others to place each knife in it's appropriate category -- I have my own opinion as do most.
Bruce