War is famously serandipitous, and often involves luck and chance. You can't always know what's going to be decisive before it is. If you goin have a huge battle, throw a ton of your strength in for some inna war winning or war losing objective. But if they cancel it, the germans will understand that the traffic's been compromised. He'll change the way they code things. So sometimes you make these hard choices to keep the information conduit open and save it for the really big, decisive moments. I mean, make something like the whole north africa campaign look kind of different. Everybody thought montgomery was reading romell's mind. And as