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Military analysts and historians disagree on the strategic significance of the battle, although most describe it as a British tactical and operational success. In 1919, Ludendorff wrote that the British victory cost the German army dear and drained German reserves. Hindenburg wrote that the losses at Messines had been very heavy and that he regretted that the ground had not been evacuated; in 1922, Kuhl called it one of the worst German tragedies of the war. In 1920 Haig's Dispatches described the success of the British plan, organisation and results but refrained from hyperbole, referring to the operation as a successful preliminary to the main offensive at Ypres. In 1930, Liddell Hart thought the success at Messines inflated expectations for the Third Battle of Ypres and that because the circumstances of the operations were different, attempts to apply similar tactics resulted in failure. In 1938 Lloyd George called the battle an apéritif and in 1939, G. C. Wynne judged it to be a "brilliant success", overshadowed by the subsequent tragedy of the Battles of Passchendaele. The Official Historian called it a "great victory" in 1948 and Prior and Wilson (1997) called the battle a "noteworthy success" but then complained about the decision to postpone exploitation of the success on the Gheluvelt plateau. Ashley Ekins referred to the battle as a great set-piece victory, which was also costly, particularly for the infantry of II Anzac Corps, as did Christopher Pugsley, referring to the experience of the New Zealand Division. Heinz Hagenlücke called it a great British success and wrote that the loss of the ridge, had a worse effect on German morale than the number of casualties. Jack Sheldon called it a "significant victory" for the British and a "disaster" for the German army, which was forced into a "lengthy period of anxious waiting".