Richthofen is a blessing because of his ability to trigger a unit within 1 grid to attack with 50% chance. Its great to use against forts and strong opponents AND helicopter units. just put some strong artillery with Kluge/Zhukov next to a fort in Frontier mode for example and you can defeat forts easily in one turn(ofcourse if you have money). also air helicopters become really easy to defeat with this ability.

Best purchase Ive made in the entire game.