Can the Erwin Rommel card be played even if the doubled combat factor is for a unit that won't be attacking? There is an advantage, after all, to draw a replacement card.
No you can't.
You need to fulfill the first condition (Doubled Combat Factor) before you can get one of the two others because of the "and" statement.
The cards says:
"Play during the Battle Sequence to double the Combat Strength of a single unit stacked with the face-up Rommel marker and either draw one card or permanently remove the O’Connor leader from the game."
To PLAY the card (and trigger the other effects) you need to do this during the Battle Sequence to double a unit under the face-up Rommel counter. If you do this you may either:
- Draw one Card.
- Remove the O'Connor leader.