It is, as already stated, difficult to effect a surprise upon the large scale in modern warfare. There are still, however, certain departments in which with energy and ingenuity effects may be produced as unforeseen as they are disconcerting. The Air Service of the Allies, about which a book which would be one long epic of heroism could be written, had been growing stronger, and had dominated the situation during the last few weeks, but it had not shown its full strength nor its intentions until the evening before the bombardment. Then it disclosed both in most dramatic fashion. Either side had lines of stationary airships from which shell-fire is observed. To the stranger approaching the lines they are the first intimation that he is in the danger area, and he sees them in a double row, extending in a gradually dwindling vista to either horizon. Now by a single raid and in a single night, every observation airship of the Germans was brought in flames to the earth. It was a splendid coup, splendidly carried out. Where the setting sun had shone on a long German array the dawn showed an empty eastern sky. From that day for many a month the Allies had command of the air with all that it means to modern artillery. It was a good omen for the coming fight, and a sign of the great efficiency to which the British Air Service under General Trenchard had attained. The various types for scouting, for artillery work, {39} for raiding, and for fighting were all very highly developed and splendidly handled by as gallant and chivalrous a band of heroic youths as Britain has ever enrolled among her guardians. The new F.E. machine and the de Haviland Biplane fighting machine were at this time equal to anything the Germans had in the air. The attack had been planned for June 28, but the weather was so tempestuous that it was put off until it should moderate, a change which was a great strain upon every one concerned. July 1 broke calm and warm with a gentle south-western breeze. The day had come. All morning from early dawn there was intense fire, intensely answered, with smoke barrages thrown during the last half-hour to such points as could with advantage be screened. At 7.30 the guns lifted, the whistles blew, and the eager infantry were over the parapets. The great Battle of the Somme, the fierce crisis of Armageddon, had come. In following the fate of the various British forces during this eventful and most bloody day we will begin at the northern end of the line, where the Seventh Corps (Snow) faced the salient of Gommecourt.