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 : Gunther Seibicke (30 August 1911 -- 26 May 1943) was a German U-boat commander in World War II and recipient of the Knight's Cross of the Iron Cross.
Question : Which historic war did Gunther Seibicke participate?
Student:
World War II