Unexpected is derived from Expect. Expect is a type of Judge. Reject is a type of Judge. Reject is the opposite of Admit. 
you are likely to find Rifle in/at/on War. War is related to Strategic. 
Unexpected --DerivedFrom--> Expect --IsA--> Judge <--IsA-- Reject <--Antonym--> Admit 
Rifle --AtLocation--> War <--RelatedTo--> Strategic 