Q: You will be given a context, a subject and a relation. Your task is to generate a question based on the subject and relation. The generated question should include the given subject. Try to use a minimum number of words that are not present in either context, subject or relation while generating question.
Context : Paul Claas (12 December 1908 -- 20 June 1943) was a highly decorated Major in the Luftwaffe during World War II, and a recipient of the Knight's Cross of the Iron Cross. 
Subject : Paul Claas 
Relation : conflict
A:
In what war was Paul Claas a combatant?