Sorry if I wasn´t clear enough. Second try.
Situation: my infantry fast moves trough some woods into a building which I believed was empty, but when my two squads enter they find an arty FO, which is killed within 10 seconds. The FO hasn´t fired any arty at all (this is in the beginning of the battle).
When I select the dead FO (the dead body on the ground), it just says arty FO. But when I click enter, the ugly black box pops up and says "140mm off-map arty". How the heck can my men know that?
I guess its possible the FO while he got a burst of bullets through his chest screamed into his radio "Get those 140mm pieces firing already!", but since the fog of war is pretty thick most of the time, I think it would be more realistic to just have the box say off-map arty FO, nothing more.