it is also not good that the veteran prevail over the historian" and then proceeded to take Liddell Hart to task for "suppressing the culminating battles of the war", thus "allow[ing] his portrayal of British generals to assume an easy continuum, from incompetence on the Western Front to conservatism in the 1920s...." While British leadership at the beginning of the war made costly mistakes, by 1915–16 the General Staff were making great efforts to lessen British casualties through better tactics (night attacks, creeping barrages and air power) and weapons technology (poison gas and later the arrival of the tank). British generals were not the only ones to make mistakes about the nature of modern conflict: the Russian armies too suffered badly during the first years of the war, most notably at the Battle of Tannenberg. German tactics are routinely criticised for involving the immediate counterattacking of lost ground, leading to lopsided losses in essentially defensive actions. To many generals who had fought colonial wars during the second half of the 19th century, where the Napoleonic concepts of discipline and pitched battles were still successful, fighting another highly industrialised power with equal and sometimes superior technology required an extreme change in thinking. Later, Strachan, in reviewing Aspects of the British experience of the First World War edited by Michael Howard, observed that "In the study of the First World War in particular, the divide between professionals and amateurs has never been firmly fixed". Strachan points out that revisionists take strong exception to the amateurs, particularly in the media, with whom they disagree, while at the same time Gary Sheffield welcomes to the revisionist cause the work of many "hobby"-ists who only later migrated to academic study. Gordon Corrigan, for example, did not even consider Clark to be a historian. The phrase "lions led by donkeys" has been said to have produced a false, or at least very incomplete, picture of generalship in the First World War, giving an impression of generals as "château generals", living in splendour, indifferent to the sufferings of the men under their command, only interested in cavalry charges and shooting cowards. One historian wrote that "the idea that they were indifferent to the sufferings of their men is constantly refuted by the facts, and only endures because some commentators wish to perpetuate the myth that these generals, representing the upper classes, did not give a damn what