A so let's talk about what's in the book. It's 13 parts, none of them too long. First calculations. Andrew, what do you remember from this chapter here? I mr, you're laying out in first calculations, like the five big things that you need to be thinking about when you're thinking about tactics or conflict. There's the way, with capital w, there's the heavens, the earth, the field commander and the regulation. Ye a quote. Man being the secret ut for a military yes, it is the military secret. A ha ha. Whereas i go, this is an ancient thing that's been used for thousands of years by this is the