Question: In what War was Prince Christoph of Hesse accidentally killed?
Sentence (from "Princess Christina Margarethe of Hesse"): Princess Christina Margarethe of Hesse (German: "Prinzessin Christina Margarethe von Hessen" ; 10 January 1933 – 22 November 2011) was the eldest daughter of Prince Christoph of Hesse and Princess Sophie of Greece and Denmark.
Relevant evidence: Yes