Q: Generate a correct and concise answer for the question based on the words in the context.
Context : Andrew Edward McKeever DSO, MC & Bar, DFC (21 August 1894 -- 25 December 1919) was a Canadian World War I two-seater flying ace who, in conjunction with his gunners, was credited with 31 victories.
Question : Which historic war did Andrew Edward McKeever participate?
A:
World War I