Recent scholarship by Holger Afflerbach and others, however, has questioned the veracity of the Christmas memo. No copy has ever surfaced and the only account of it appeared in Falkenhayn's post-war memoir. His army commanders at Verdun, including the German Crown Prince, denied any knowledge of an attrition strategy. It is possible that Falkenhayn did not specifically design the battle to bleed the French army but used this supposed motive after the fact in an attempt to justify the Verdun offensive, despite its failure.