Dug-in Units, officers and their application

[cjsiam]

Just to close this off....

12.43 in Fourth edition is clear...

The defender gets to choose EITHER:
a) First fire with those dug in

OR

b) Simultaneous fire with ALL the units --and the attacker at same time.

So---
There is no "two defensive fire scenarios".....the rules are explicit.
The Officer impacts (with both combat factors and presence) the SINGLE assault roll the defenders make...

cj