Battle is related to Session. Session is related to Lesson. Lesson is related to History. History is related to Social. 
the last thing you do when you Study is Graduate. Study can be used for Learning. Village can be used for Learning. you are likely to find Market in/at/on Village. 
Battle <--RelatedTo--> Session <--RelatedTo--> Lesson <--RelatedTo--> History <--RelatedTo--> Social 
Graduate <--HasLastSubevent-- Study --UsedFor--> Learning <--UsedFor-- Village <--AtLocation-- Market 