EPISODES OF THE GREAT WAR [1918 British army which played the greatest part, Foch and Haig working together in perfect unity. The Battle of Amiens was a conspicuous success. It was, in Ludendorff's phrase, " the black day of the German army in the history of the war." Suc- cess was due to the brilliant tactical surprise and the high efficiency of the new tanks which took the place of the preliminary bombardment. At one point the British tanks took captive a German regimental mess while it was breakfasting ; at another the whole staff of a division was seized; in some villages the Germans were taken in their billets before they knew what had happened, and parties of the enemy were made prisoner when working in the harvest fields. The battle, the first phase of the Allies' offensive, closed upon the 12th. For they were in the old battle area, whose tangled wilderness gave unrivalled oppor- tunities for defence, and the enemy had been heavily reinforced. He had a moment of respite ; but it had been won at the expense of his waning reserves. The effect of the Battle of Amiens had far greater importance than the material result. The mental condition of the enemy has been described by Sir Douglas Haig : " Buoyed up by the hope of im- mediate and decisive victory, to be followed by an early and favourable peace, constantly assured that the Allied reserves were exhausted, the German soldiery suddenly found themselves attacked on two fronts and thrown back with heavy losses from large and important portions of their earlier gains. The reaction was inevitable and of a deep and lasting character." The effect upon their leaders was still 356