I guess my question is, if a cards units are not placed at the start of a scenario (for example, German Card #9) when would you place the defense piece?
The other units will enter during play, so would you place the defensive piece when it is pulled from the AI Draw Cup or when it is the player's turn?
Ah sorry, i didn't understand your question.
G 3.7.3 Defense Counters
You place immediatly the defense counter you draw on any hex not adjacent to an ennemy unit and that doesn't already contain a defense counter.