Soldiers without death dates

For the original sample for vets without death dates,the rule was once we had two NF decades after 1880 to stop looking and assume he was dead.  You could mark the two decades yellow and any remaining decades would be marked not searched. If you get a guy like that, we would like you to mark it as you do the children without death dates. 

Mark all decades as yellow unless you have some evidence indicating the vet is dead.