I know that some of you will disagree with me on this one. For a good knife for field use that is adequate for self-defense, I like the USMC Mark 2 Combat Knife, commonly called the KaBar. This was first adopted by the United States Marine Corps in November 1942.
Since the early 1960’s I have had several of these and they have all held up well. They have a seven-inch blade which I have found adequate for chopping up wood for kindling, making snares and other uses around camp. Just the other day I used one for cleaning and filleting salmon.
Now I am not putting down all the new knife designs, I have several and some of them are very good, but expensive. I like pocket knives, you will always find at least one folding knife in my pocket. However good KaBars are reasonably priced and you can afford to buy several. Just as a point of information, KaBar was only one of several manufacturers of the Mark 2. The knife just picked up there name as a nickname. All the companies that made them for the government met high standards. I have several made by Ontario (a knife manufacturer, not the city). The Mark 2 is still US Military issue.
If you are building a primitive shelter or doing camp chores in a survival situation, you need a knife you can depend on and preferably more than one. Also, there is something to say for becoming familiar with your tools. I see some people who are always buying the latest and greatest and never really learning what there knives can and can’t do.
Whatever knife you choose, take it out and use it, learn what you can accomplish with it.