Effect is related to Event. Event is related to War. War can be Terrible. Terrible is a synonym of Severe. 
National is etymologically related to Nation. Nation is related to Identity. Person wants (to) Identity. Person wants (to) Popularity. 
Effect <--RelatedTo--> Event <--RelatedTo--> War --HasProperty--> Terrible <--Synonym--> Severe 
National --EtymologicallyRelatedTo--> Nation <--RelatedTo--> Identity <--Desires-- Person --Desires--> Popularity 