As per the FAQ in the 2012 NetEA Tournament Pack:
Quote:
Q:Does a counter-charge trigger Overwatch?
A:No. The “move” referred to in the OW rule refers to moves made as part of an action, as described in section 1.7.
The Devastators would be able to OW if the Plague Tower was initiating the engagement and that would use the following rules:
Quote:
Q:When can I fire OW? As I understand that I can choose to shoot:
1)before my opponent unloads troops,
2)after my opponent unloads troops and before he shoots or assault
3)after my opponent unloads troops and after he shoots or assault
A:After your opponent completes a move OR after disembarking troops, but before he does anything else, including shooting. So option 1 and option 2 but not option 3.
Also remeber that:
Quote:
Enemy formations on overwatch can shoot at formations making withdrawal moves.