as well prepared as the number of men available would allow. There were not enough to man continuous lines of trenches over so great a front. A system was adopted, therefore, by which there was an advanced zone, consisting of a thin line of infantry supported by numerous small redoubts, each of which contained several machine-guns and a company of infantry. These were to take off the edge of the assault, and it was hoped, as half a mile separated the two armies, and the fields of fire were good, that before reaching the position at all the enemy would suffer severely. A thousand yards behind the advance zone was the true battle zone, where the main body of the infantry lay behind barbed wire with the support of isolated forts. Beyond these again was a third zone, 2000 yards farther to the rear, but this had not yet been {12} completed. Behind the whole position in the southern part of the line was the great bend of the River Somme, which was also being organised as a reserve line, but was very incomplete. It should be emphasised that these deficiencies were in no way due to the British command, which was so assiduous in its preparations that it rather raised the ridicule of certain unimaginative people upon the spot who cannot see a danger until it actually materialises in front of them. The fact that General Gough had been a cavalry general, and that his actions in the war had been aggressive rather than defensive, gave a false impression at the time in certain quarters. It is certain that nothing was neglected in the way of defence which skill could devise or industry carry out. The general situation then upon the night of March 20, when the German preparations were complete, was that along the whole front the Germans were crouching for their spring, and that their first line consisted of sixty divisions, or more than half a million infantry, against the twenty-four divisions, or about 200,000 infantry, who awaited them. The odds were greatly increased by the fact that the Germans held some thirty divisions in immediate reserve, whereas the British reserves, especially in the south of the line, were few and distant. The German concentration of gun power was more than twice that of the British. The published account of a German officer claims it as fourfold, but this is probably an over-statement. In describing the results of this great attack we shall deal first with the sequence of events in the sector of the Third Army in the north, and then turn to those connected with the Fifth Army in the south. {13} CHAPTER II THE SECOND BATTLE OF THE SOMME Attack upon the Seventeenth and Sixth Corps