Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.

Context : Claude Francois Ferey, Baron de Rozengath (21 September 1771 -- 22 July 1812) became a division commander during the Napoleonic Wars and was killed fighting the British in Spain.
Answer : Napoleonic Wars
In which war did Claude Francois Ferey serve?