The German plans for Verdun appear to have entirely abandoned the idea of a breakthrough, Falkenhayn himself describing such a full-scale assault as a ‘doubtful operation … which is beyond our forces’ and which might lead to German forces being trapped in untenable salients that could be pounded from both flanks. Verdun was chosen as the objective since it was perceived both as a base from which the French could launch a potentially decisive offensive and because it had acquired an almost mystical significance during the Franco-Prussian War. Ironically, the Germans underrated their own fascination for the fortress city. The ever-aggressive General Charles Mangin noted that ‘Verdun has always exercised a singular fascination upon the German imagination, and its capture, which seemed relatively easy, could in itself be celebrated as a great victory in Germany and in neutral countries.’
On the French side the success of German heavy artillery in 1914 had convinced GQG’s theorists that fortresses were potential death-traps which might enable the enemy to isolate and capture large numbers of men. The capitulation of forts on the Eastern Front in 1915 appeared to further confirm the lessons of 1870 and Joffre had ordered the remaining forts to be stripped of their guns in late 1914 to reinforce the army artillery. The theory was that fortresses supported the defensive system but were too fragile to function as a strong-point upon which the entire system could succeed or fail. Placing valuable artillery in a position that the enemy could easily target seemed akin to placing too many eggs in one basket. General Herr protested that there was a difference between an isolated fortress and a fort in a defensive system but his memoranda were ignored. Herr’s problem was exacerbated by the relative inactivity seen in the Verdun sector since the Marne. With major assaults being planned elsewhere and the rumours of an attack assumed to presage a limited assault, GQG assigned Verdun territorial units and concentrated on offensive planning.
Oblivious to their unintended assistance from GQG, the Germans deployed vast quantities of equipment and ammunition and began to construct bomb-proof stollen (shelters) for the assault troops being moved into the line. Infantry units were given strict instructions not to push out ‘parallels of departure’ or Russian saps that might give away the on-going preparations for the offensive. Artillery units were moved forwards and carefully concealed. Most batteries were under orders to hold their fire until Operation Gericht had commenced so that the French would be surprised by the 306 field guns, 542 heavy guns and 152 minenwerfer directly behind the assault units and the 400 additional guns supporting the offensive on the flank. Entirely fooled by the German deception plan, the French artillery was outnumbered by a ratio of 4:1 and French military intelligence had identified only 70 gun emplacements before the battle. Most dangerously, they totally missed the larger guns assigned to smash the forts, including the 420mm and 380mm heavy howitzers; the latter could drop 40 shells a day on almost any target in the Verdun sector.
In General Schnabel’s fire-plan, the 210mm batteries were assigned to pulverise the front line then place a curtain barrage to block any potential counter-attack as the leading assault units consolidated their hard-won objectives. Strong-points would be reduced by both the heavy guns and minenwerfers and the 150mm batteries would then be assigned to both counter-battery missions and to interdict the supply network and rear areas. ‘No line is to remain unbounded and no possibilities of supply unmolested, nowhere should the enemy feel safe.’ The 150mm batteries assigned to counter-battery work would use zone-fire, deluging entire areas instead of trying to hit individual targets, adjusting rapidly with the aid of air observers, instead of relying on more precise methods of adjustment. This required substantially more ammunition but the use of asphyxiating and lachrymatory agents delivered by gas shell successfully enabled the German gunners to neutralise the French batteries. The lighter guns would move forwards as soon as the assault began so that the heavy guns could be shifted to new positions capable of covering the new front line. The Germans stocked 2. 5 million rounds alongside the batteries, and intended to fire the bulk of them in only 9½ hours on a 22-kilometre stretch of front before an infantry attack only 7 kilometres wide. It would be an unprecedented demonstration of the power of modern artillery.
The bombardment was delayed by poor weather but finally began on 21 February. It was initially general, with batteries concentrating on key objectives only after the French defensive communication system was judged to have been sufficiently disrupted. In the final stages of the fire-plan, patrols were filtered into the gaps between the main target zones to assess the remaining defences. A horrified French air observer saw no evidence of a gap in the carnage and reported that ‘there are gun batteries everywhere. They follow each other non-stop; the flames from their shells form an unbroken sheet.’ Another described the fire as ‘a storm, a hurricane, a tempest growing ever stronger, where it is raining nothing but paving stones’. Fire jumped to the second line and continued on into the rear areas and out on to the flanks as the infantry advanced and the Germans surged forwards, only to halt as soon as they reached their primary objectives. They had been instructed not to push beyond these locations and new units moved forwards methodically to assault the second line; the General Staff had seen the effect of artillery barrages on attacks that were unsupported by counter-batteries and were wary of repeating what they saw as Gallic over-enthusiasm. ‘The mission of infantry units is generally as follows: to seize a part of the hostile fortified system on a front and to a depth which has been delimited in advance; and then to hold it against intense artillery fire, and resist hostile counter attacks.’ A note written by a staff officer in the same division (the 20th Bavarian Brigade) summarised the official view on initiative:
It is possible that the enemy situation may be such as to permit the attack to be continued beyond the line that has been designated, and to capture certain points which the subordinate may consider of secondary importance. Do not forget that our artillery will not be in condition, if progress is made beyond the designated line, to immediately execute a new preparation and to quickly support the operation … The decision made by a subordinate commander to extend the attack beyond the objective is a very serious one and should be the exception. Furthermore, the responsibility of the leader is affected, if a position which has been taken be retaken by the enemy, even though the adversary thus gains only a moral success.
The highly regulated approach to securing the first line of objectives (although this theoretically abandoned any chance of a coup de main) enabled the Germans to exploit along the flanks of the initial penetration of the defensive system. German units that secured the initial objectives instinctively sought out opportunities to assist other units still struggling on their flanks. The French defensive system was severely ruptured but the combination of inflexible assault timetables and the leadership and defensive innovation displayed by the redoubtable if doomed Colonel Driant, in the section of the line dominated by the Bois-de-Caures, bought the French enough time to stabilise the front line before the Germans could realise how close they had come to a breakthrough. Driant’s simple but effective tactic was to scatter his men among the shell-holes so that the German lifting barrage, designed to ‘lift’ just before the assault infantry swarmed over the defences, fell on his empty trench line and not on the men of his beleaguered command.
During the first stage of the Verdun offensive General Fayolle noted:
The Boches have captured the front-line trench and the support trench. How do they do it: all their attacks succeed … they knock over everything with a horrifying bombardment after concentrating superior means. Thereby they suppress the trenches, the supporting defences and the machine guns. But how do they cross the barrage? Probably their infantry infiltrate, and since there is no one left in the fire trenches they get in, and when they are there to get them out we need to have the same artillery superiority.
The effect of the German heavy bombardment, involving a rate of fire that the French simply could not match, soon earned the mordant nickname trommelfeuer (drumfire). An officer of the 243rd Infantry was stunned by the destruction: ‘by three o’clock in the afternoon, the section of the wood which we occupied which, in the morning, was completely covered in bushes, looked like the timber-yard of a sawmill; a little later, I had lost most of my men.’ Kronprinz Wilhelm was delighted by the apparent destruction but was quick to note the relatively low casualties inflicted during the bombardment:
The enemy, surprised by the annihilating volume of our fire, only shelled a few villages at random. At 5 p. m. our barrage jumped on to his second line, and the skirmishers and shock troops of all corps left their trenches. The material effect of our bombardment had been, as we discovered later, rather below our expectations, as the hostile defences in the wooded country were in many cases too well concealed; the moral effect was immense.
Mangin was rather less impressed with their initial moves in the battle:
The offensive of 21st February was both terrible and stingy at the same time; it was staged on too narrow a front, which while it widened out slightly, again contracted, in spite of the great array of artillery with which it was provided, and the limitless use of infantry in deep formations, it advanced only with great effort and did not know how to profit by the gaps which were in front of it on certain days. When it was decided to extend it to the left bank of the Meuse, it was too late; the defence had got a new hold on itself and had been organised.
As Mangin had noted, the first assaults were focused on the right bank of the Meuse and ignored the defensive positions on the left bank; for planning purposes, it was assumed that the counter-battery artillery would deal with any batteries flanking the main assault. Considering that the German plan was intended to maximise French casualties by retaining complete air and artillery dominance of the battlefield, the decision to leave the French batteries on the left bank almost completely unmolested by infantry seems to have been a major error in the planning for the first phase of the operation. As successive assaults went in, the obsolete but cunningly emplaced 155mm batteries on the left bank shrugged off the increasingly desperate attempts to silence them and poured fire into General von Zwehl’s VII Korps every time they recommenced their advance. In spite of a spirited defence and an overly methodical fire-plan, the Germans still drove deep. Their overwhelming superiority in both guns and tactics enabled them to consolidate most of their initial objectives but as soon as the French threw in reserves, they launched vigorous counter-attacks and casualties on both sides began to mount. What Mangin bitterly described as the age of ‘mechanical’ battle had begun.
After the under-garrisoned and ill-armed Fort Douaumont fell, isolated by a near-constant barrage that gradually drove the supporting units to positions from where they were unable to cover the entrances to the fort, the Germans commenced a series of remorseless assaults on positions on both banks of the Meuse. Stunned by the initial reverses, Joffre sacked all the officers he saw as responsible for the débâcle and assigned Pétain to command the sector. Colonel Driant’s tactical success with dispersed defences in the Bois-de-Caures during the first day of fighting was extended into a broader operational concept based upon ‘an advanced line of resistance’ consisting of forward outposts and observation positions backed up by ‘a principal line of resistance’ where localised reserves could gather and retake any lost positions with the assistance of attached artillery units. The concept of the easily identified defensive line was being aban-doned in the face of increasing firepower. Counter-battery and curtain barrages by the heavy artillery units delayed the enemy while creeping barrages supported counter-attacks.
Pétain, ably assisted by the slippery but brilliant Nivelle and the implacable Mangin, stabilised the Verdun sector by creating a position de barrage behind the front line, then using the old forts as armoured bastions in a defensive system that served as a protective zone in which the reserves could gather and launch counter-attacks. Unsurprisingly the artillery was seen as the key to this enhanced system and Pétain demanded additional artillery. The continuing carnage forced Joffre to confront the consequences of years of mismanagement at GQG. The French artillery was still outclassed and outranged by the Germans, giving Kronprinz Wilhelm a priceless advantage in a battle where artillery was the key to victory. The evidence was conclusive enough to convince Joffre, who demanded that 960 medium and 440 heavy guns should be produced as quickly as possible. Even with better weapons, French supplies were being brought along a narrow-gauge railway and the one forlorn, wreckage-strewn road into the salient and Army Group Centre could not hope to equal the near-continuous German barrage even if they wanted to. An American, working as a volunteer ambulance driver, asked about the rumble of thunder he heard as they approached the city and wondered if there was a storm coming. The driver shook his head in despair. ‘If it were thunder the noise would stop occasionally. The noise is constant. It’s Verdun.’