I am currently using the 'holocaust' sticker for this purpose, but it should be a fairly general sticker. Every conflict knows 'collateral damage'.victims.
I am not very well informed about use and structure of Stickers, but my thoughts are as follows:
Fields to be considered:
!Fate: options e.g. died, wounded, disappeard, hostage, prisoner, internment, concentration camp, death camp, labor camp
!Year: e.g. 1940
!Conflict: e.g. ww1, ww2, ww3, Vietnam
!Reason: (free text) e.g. bombing, fighting, starvation
!Where: (free text) e.g. Rotterdam, Gettysburg
!Text: (free text)
Example: (person) died in 1940 during WW2 during the german bombing of Rotterdam, the Netherlands