all the lessons Ludendorff impressed upon his troops in the first three months of 1918. But--and of this there can be no shadow of doubt to-day--it laid the foundations of final victory.[20] The German troops were never quite the same after it, while our young levies, dreadful as were their sacrifices, were to arrive at a far higher standard of military value. The 36th Division was the left Division of the X. Corps, having on its right the 32nd Division and on its left the 29th Division, not long arrived from the East, which was in the VIII. Corps. The 49th Division was in X. Corps Reserve. The 36th Division was to attack astride the Ancre. On the left, or southern bank, its objective was the fifth line of German trenches, known as the "D" line.[21] The right flank boundary ran from the north-east corner of Thiepval Wood to D 8. On the right bank the objective was a triangle of trenches enclosed between the left boundary line and the Ancre, beyond Beaucourt Station. The left boundary ran from the point of the salient in our lines, known as the Mary Redan, to two houses half-way between Beaucourt and its railway station, thence along the river to the railway bridge. The ground rose sharply on either side from the deep-cut bed of the Ancre, but while on the northern bank it was cut by a gorge running down from the village of Beaumont-Hamel, at right angles to the river, and parallel with the German trenches, on the south it swelled up in a great convex curve, rising two hundred and fifty feet in a thousand yards. The crest was crowned by a parallelogram of trenches, extending from the German "B" line to the "C" line, that will live long in history as the Schwaben Redoubt. The trenches were defended by masses of wire. An artillery officer, who made a careful reconnaissance with a good glass from "Brock's Benefit," on the Mesnil Ridge, counted sixteen rows guarding the front line just south of the river, and an average of five rows along the second line. The dug-outs, most of them at least thirty feet deep in the chalk, were to all intents and purposes shell-proof, and were numerous enough to house the whole trench garrison. The enormous activity behind our lines had taught the Germans long before that an attack was brewing. They trusted to their fortifications and awaited it with confidence.