Frontline Books, Barnsley, new ed., 2012. Xxxii + 134 pp., + 8 pp., of maps + a frontis-port. D.j., 24 x 15cm. FINE. This is an account of the opening campaign of the First World War on the Western Front, as experienced by the commander of the German First Army, Alexander von Kluck. Forming the westernmost flank of the great wheeling manoeuvre through Belgium and Northern France that was at the heart of the Schlieffen Plan, von Kluck’s army played a vital role. The first battles fought by the British Expeditionary Force, at Mons and Le Cateau, were against the First Army, and it was von Kluck’s decisions later in the campaign that were held by many to have resulted in the German defeat on the Marne. This is a fascinating account of the campaign that set the future course of the war and gives von Kluck’s explanations for his actions that left the German Empire in a prolonged war of attrition it could not win, precisely what the Schlieffen Plan was intended to avoid.