Teacher:Generate a correct and concise answer for the question based on the words in the context.
Teacher: Now, understand the problem? Solve this instance: Context : Karl-Wilhelm von Schlieben (30 October 1894 -- 18 June 1964) was a German officer in World War I and World War II. 
Question : Which war did Karl-Wilhelm von Schlieben participate in?
Student:
World War I