Reading comments on the boards from players who have tried out the demo, I have heard much wailing and gnashing of teeth about the army interface, how to manage HQ's, and so on.
In truth, managing these aspects is rather simple, so much so that it is possible for me to conquer Poland in a little over a month without sending a single move order and with perhaps half a dozen clicks of the mouse.
This AAR will be an illustrated primer on how to manage your armies to your hearts content.
Note that this AAR will be somewhat picture heavy. Hopefully photobucket won't weep for mercy.
Also please read through some of the comments, especially those by potski, they further explain this system.
Finally, note that this guide has already been edited and corrected two or three times, so its possible I've made some errors about the capabilities of the system. Furthermore, this guide was written, as the title would indicate, during the demo period before the game came out. The AAR mostly covers the *interface* behind AI control of armies and that should remain roughly unchanged through future patches, but note that the precise results one can expect from AI control will change as patches are released. Nonetheless, this AAR should get you started on such basic thing as how to set objectives without problem, and from there you can experiment yourself.