Noting Keegan's works on the Waffen-SS, the military historian S.P. MacKenzie describes him as a popular historian "partially or wholly seduced by mystique". He connects Keegan with contemporary Waffen-SS historical revisionism, first propounded by HIAG, the Waffen-SS lobby group from the 1950–1990s. Commenting on this contemporary trend, Mackenzie writes that "as the older generation of Waffen-SS scribes has died off, a new, post-war cadre of writers has done much to perpetuate the image of the force as a revolutionary European army" and includes Keegan in the group.