It's also an incoherent collection of incomplete fragments since the bindings in medium it was originally written on had all decayed leaving a bunch of broken bits that don't clearly fit together.

The only broadly applicable bits are the handful of lines that everyone knows anyways, the ones about not fighting unless absolutely necessary and that you should be aware of what you and your opponent are capable of. Well that and the insistence on logistics, like half of it is just variations on "and remember to pack a lunch."