In the dark of the evening of the 19th the Tanks nosed their way from their lairs towards the point of departure, going across country, since the roads were crowded, and running dead slow to avoid noise. That evening General Hugh Elles issued a special order announcing that he proposed to lead the attack of the centre division in person, like an admiral in his flagship. At 4.30 on the morning of the 20th a burst of German fire suggested that the enemy had discovered the secret, but to the relief of the British commanders it died away, and the hour before the attack opened was dead quiet.
[Illustration: Cambrai--the Advance of the Infantry Divisions on November 20.]
Day dawned with heavy clouds that promised rain before evening. At 6 o'clock a solitary gun broke the silence. It was the signal, and from just north of the Bapaume road to the hamlet of Gonnelieu in the south, a stupendous barrage crashed from the British line. The whole horizon was aflame, and volcanoes of earth spouted from the German lines. Wakened suddenly from sleep, and dazed with the gun-fire, the enemy sent up star shell after star shell in appeal to his artillery; but, as he strove to man his trenches, out of the fog of dawn came something more terrible than shells--the blunt noses of 350 Tanks tearing and snapping the wire and grinding down the parapets. The instant result was panic. In a few minutes the German outposts fell; presently the main Hindenburg Line followed, and the fighting reached the tunnels of the reserve line. By half-past 10 that also had vanished, and the British infantry, with cavalry close behind, was advancing in open country.
General Elles, in his flagship "Hilda," was first in the advance, and it was reported that he did much of his observing with his head thrust through the hatch in the roof, using his feet on the gunner's ribs to indicate the direction of targets. The "Hilda" flew the flag of the Tank Corps; that flag was several times hit, but not brought down. Comedy was not absent from that wild day. One member of a Tank crew lost his wig as his head emerged from the man-hole, and the official mind was racked for months with the problem whether this came under the head of loss of field equipment, of a limb, or clothing. Nor was heroism wanting on the enemy's side. The British official dispatch records one instance. "Many of the hits upon our defences at Flesquières were obtained by a German artillery officer who, remaining alone at his battery, served a field-gun single-handed until killed at his gun. The great bravery of this officer aroused the admiration of all ranks."
