 Complete the following phrase:  Producers of television documentaries about the war have had to grapple with the lions led by donkeys interpretive frame since the 1960s. The 1964 seminal and award-winning BBC Television The Great War has been described as taking a moderate approach, with co-scriptwriter John Terraine fighting against what he viewed as an oversimplification, while Liddell Hart resigned as an advising historian to the series, in an open letter to The Times, in part over a dispute with Terraine, claiming that he minimised the faults of the High Command on 