Even my largest and most important operations orders were verbal [oral]. After all there wasn't any need for written orders. As division commander, I forbade the use of written orders within my division."
Kind of the opposite extreme of things, the "no written orders" angle.
Consider the source and the organizational culture the source belonged to. This was one division within a nation's Army that had multiple Corps. Possible if the culture was developed from the top-down. Exception rather than the rule though. That'd leave a lot of room open for interpretation of commander's intent . . . and possible mis-communication of orders.