Good knowledge of a territory is crucial to any war. If you are a soldier who has to move forward into an unknown area, you need a good map. If there is no map in existence, you need to create one. Captain Ludwig Baehr designed these instructions for how to create high-quality military drawings. He uses text as well to show good and bad examples. Military drawings communicated important information about enemy territory, and a good drawing, claims the booklet, has to be simple and clear. If you draw too many trees, for instance, you will not be aware of the houses from which an opposing trooper could ambush you.