Well I find this a bit odd, since it seems as if many others have used similar syntax:
Trigger1
Condition: isNull soldier_1
OnAct: hint "The soldier is null"
SoldierWB
Name: soldier_1
Presence: 50%
When I preview, irregardless if the soldier is present or not, nothing displays.
I'm running v1.14 - is this maybe the issue? I can't seem to find any explanation...