there's a comprehensive list SOMEWHERE on this forum
well, probably needs updating...
so, breakage, not done in a test situation? rare. there have been several instances of abuse (throwing, batoning with a hammer or something metal, etc)
what's left? we had a handful of people across a decade or TWO with big chip outs from attempting to chop and/or baton through frozen wood, in particular, hitting rock hard knots in evergreen type materials (silicated knots == rocks). imho, that's user error.
it probably needs to be said more often, but don't chop frozen xmas trees, or at least, do not chop the knots (which includes where the branches join the trunk). use a hammer

or loppers ;> or a saw.
ever see a chain saw throw arcs of sparks when sawing up stuff like that? wonder where those sparks are coming from? that's burning metal. from your chain. mmm, now what could be making the metal do that? embedded materials, nails, dirt/sand, and KNOTS
what else? as above, with embedded materials, we've had some knives go through nails, and such by mistake. the edges usually held up well. there have been a couple chip out fractures (just like flint).
in almost every case KaBar has warranted these blades. happy enough customers. even some of the abuse cases, but that's their call. they don't HAVE to. esp if you say, cut into your knife with an angle grinder, and then smacked it around with a hammer/vise combo. short form: if you chuck your knife in a vise, and break it, that's abuse imho
what's left? gosh. i'm failing to come up with examples. must not have enough coffee.
it's really hard to break a good piece of heat treated steel just by using it. the stuff is not glass, it doesn't shatter, and most people aren't strong enough to bend even a BK14 in half with their hands, not easily anyway, and a BK3? very unlikely.
if you goto the ESEE hall of fame, they have pictures of buckets of their broken knives. many of them at the hands of abuse, trying to get a free, new knife. some failed doing extreme things. there might have been a couple that failed as the result of manufacturing defects, but that's super rare. everything can be broken if you try.
so, to the OP, if this was a serious question, there you go. if not, there you go.