The John Donne reference was to the poem containing the lines "no man is an island...ask not for whom the bell tolls..." etcetera.

Have you read John Keegan's volume on the first World War(which required Keegan to deal with the Cultures of England, Hohenzollern Germany, Romanov Russia, Habsburg and Ottoman empires, and various minor states in Europe) or anything else he has authored?

If so what would lead you to think that Keegan engages in superficial revisionism?