Cause of death: death in action
Georges Guynemer (French pronunciation: [ʒɔʁʒ ɡinmɛːʁ], 24 December 1894 – 11 September 1917 MIA) was the second highest-scoring French fighter ace with 54 victories during World War I, and a French national hero at the time of his death. Guynemer's death was a profound shock to France.
Source : Wikipedia
