Original sentence: He produced several more studies of the First and Second World Wars, before becoming involved in politics.In more recent years this work has been condemned by some historians for being one-sided in his treatment of World War One generals.When challenged by the eminent military historian John Terraine he was unable to provide an attribution for his Donkeys and Lions quotation
Edited sentence: He produced several more respected studies of the First and Second World Wars, before becoming involved in politics.However, in more recent years this work has been condemned by some historians for being one-sided and failing to recognise the intelligence and humanity of the large majority of World War One generals.Indeed when challenged by the eminent military historian John Terraine he was unable to provide an attribution for his Donkeys and Lions quotation