By the autumn of 1916, with the formation of the new Jagdstaffeln, the pendulum of aerial supremacy had once again swung in favor of the German Air Force. The battle of the Somme in 1916 saw the RFC suffer losses of nearly 400 aircrew between September and November, and British casualties were to reach a zenith in the 'Bloody April' of 1917 when 319 aircrew were lost, killed or taken prisoner of war. This was the situation when No 56 Squadron arrived in France at the end of April 1917. Equipped with the superb new SE 5, it was the first fighter squadron of the RFC to be able to meet the...