The Strategic Outlook in 1915
With the beginning of trench warfare, both sides began assessing their options for bringing the war to a successful conclusion. Overseeing German operations, Chief of the General Staff Erich von Falkenhayn preferred to focus on winning the war on the Western Front as he believed that a separate peace could be obtained with Russia if they were allowed to exit the conflict with some pride. This approach clashed with Generals Paul von Hindenburg and Erich Ludendorff who wished to deliver a decisive blow in the East. The heroes of Tannenberg they were able to use their fame and political intrigue to influence the German leadership. As a result, the decision was made to focus on the Eastern Front in 1915.
In the Allied camp there was no such conflict. Both the British and French were eager to expel the Germans from the territory they had occupied in 1914. For the latter, it was both a matter of national pride and economic necessity as the occupied territory contained much of France's industry and natural resources. Instead, the challenge faced by the Allies was the matter of where to attack. This choice was largely dictated by the terrain of the Western Front. In the south, the woods, rivers, and mountains precluded conducting a major offensive, while the sodden soil of coastal Flanders quickly turned into a quagmire during shelling. In the center, the highlands along the Aisne and Meuse Rivers too greatly favored the defender.
As a result, the Allies focused their efforts on the chalklands along the Somme River in Artois and to the south in Champagne. These points were located on the edges of the deepest German penetration into France and successful attacks had the potential to cut off the enemy forces. In addition, breakthroughs at these points would sever German rail links east which would compel them to abandon their position in France.
The Fighting Resumes
While fighting had occurred through the winter, the British renewed the action in earnest on March 10, 1915, when they launched an offensive at Neuve Chapelle. Attacking in an effort to capture Aubers Ridge, British and Indian troops from Field Marshal Sir John French's British Expeditionary Force (BEF) shattered the German lines and had some initial success. The advance soon broke down due to communication and supply issues and ridge was not taken. Subsequent German counterattacks contained the breakthrough and the battle ended on March 13. In the wake of the failure, French blamed the result on a lack of shells for his guns. This precipitated the Shell Crisis of 1915 which brought down Prime Minister H.H. Asquith's Liberal government and forced an overhaul of the munitions industry.
Gas Over Ypres
Though Germany had elected to follow an "east-first" approach, Falkenhayn began planning for an operation against Ypres to begin in April. Intended as a limited offensive, he sought to divert Allied attention from troop movements east, secure a more commanding position in Flanders, as well as to test a new weapon, poison gas. Though tear gas had been used against the Russians in January, the Second Battle of Ypres marked the debut of lethal chlorine gas.
Around 5:00 PM on April 22, chlorine gas was released over a four-mile front. Striking a section line held by French territorial and colonial troops, it quickly killed around 6,000 men and forced the survivors to retreat. Advancing, the Germans made swift gains, but in the growing darkness they failed to exploit the breach. Forming a new defensive line, British and Canadian troops mounted a vigorous defensive over the next several days. While the Germans conducted additional gas attacks, Allied forces were able to implement improvised solutions to counter its effects. Fighting continued until May 25, but the Ypres salient held.
Artois & Champagne
Unlike the Germans, the Allies possessed no secret weapon when they began their next offensive in May. Striking at the German lines in Artois on May 9, the British sought to take Aubers Ridge. A few days later, the French entered the fray to the south in an effort to secure Vimy Ridge. Dubbed the Second Battle of Artois, the British were stopped dead, while the General Philippe Pétain's XXXIII Corps succeeded in reaching the crest of Vimy Ridge. Despite Pétain's success, the French lost the ridge to determined German counterattacks before their reserves could arrive.
Reorganizing during the summer as additional troops became available, the British soon took over the front as far south as the Somme. As troops were shifted, General Joseph Joffre, the overall French commander, sought to renew the offensive in Artois during the fall along with an assault in Champagne. Recognizing the obvious signs of impending attack, the Germans spent the summer strengthening their trench system, ultimately constructing a line of supporting fortifications three miles deep.
Opening the Third Battle of Artois on September 25, British forces attacked at Loos while the French assaulted Souchez. In both cases, the attack was preceded by a gas attack with mixed results. While the British made initial gains, they were soon forced back as communication and supply problems emerged. A second attack the next day was bloodily repulsed. When the fighting subsided three weeks later, over 41,000 British troops had been killed or wounded for the gain of a narrow two-mile deep salient.
To the south, the French Second and Fourth Army attacked along a twenty-mile front in Champagne on September 25. Meeting stiff resistance, Joffre's men gallantly attacked for over a month. Ending in early November, the offensive at no point had gained more than two miles, but the French lost 143,567 killed and wounded. With 1915 coming to a close, the Allies had been bled badly and had showed that they had learned little about attacking trenches while the Germans had become masters at defending them.