[Rules] Oppurtunity fire

[cjsiam]

Thks very much, I understand so  the op fire is possible if a spotted enemy unit is moving in any turn.I check 4.0 for stacking for better I imagine that I can add fire modifier of leader also adjacent leader as with direct fire???

Thks

OP fire is possible if a unit moves in LOS of an enemy, that includes unloading and some engineer activity...A Forced unload, say an AT gun forces an APC to dump infantry--DOES NOT allow an opportunity fire---where an unloading on purpose WOULD trigger Opportunity fire....

A leader's combat modifier can be added to One unit he is stacked with....to if you have 1 combat unit and two leaders, only one gets to help.....
Also...if the leader is NOT stacked with a unit, he does NOT get to attack.....he has no "inherent" DF value...