Generate a correct and concise answer for the question based on the words in the context.

Context : By the start of World War II Heinz Hämel had been promoted to Oberscharführer (Technical Sergeant) and was a platoon commander. 
Question : Which war did Heinz Hämel serve in?
World War II

Context : The Neutronium Alchemist is a science fiction novel by Peter F. Hamilton and is the second book in The Night's Dawn Trilogy. 
Question : To which series does The Neutronium Alchemist belong?
The Night's Dawn Trilogy

Context : François Goullus, was a brigadier general and baron of the First French Empire during the French Revolutionary Wars and the Napoleonic Wars. 
Question : In what war did François Goullus fight in?

Napoleonic Wars