B) Why did a stalemate develop on the Western Front?
A stalemate formed on the Western Front due to four main reasons; one being that the Schlieffen plan had failed, another reason was to do with the defence technology of the time, another reason was to do with the layout of the trenches and the last reason was to do with the bad tactics of the generals.
The Schlieffen Plan began to fail when Moltke, the German commander, altered the balance of the forces so that the right wing had three times as many troops as the left wing and as the right wing was smaller it advanced considerably slower than had been originally planned. The other main reason for the Schlieffen Plan failing was that all the assumptions made in the plan were far too optimistic: There was also more resistance from the Belgian, British and French forces than had been expected this caused the right wing to slow down and allowed the British and French forces to retreat and then counter-attack. Another reason was that Russia surprised the Germans by attacking in the east, as they had mobilised faster than Schlieffen had anticipated; Moltke then removed troops from the right wing, weakening it, and sent them to fight the Russians. The German troops then had to march more than 30km every day so by early September they were exhausted. As the Schlieffen plan was failing miserably the German troops lost a great amount of morale, however, the German army continued until they were only 40km away from Paris. Unfortunately, by the River Marne the British and French troops were blocking their way. Because the Schlieffen Plan was botched much time was wasted and so the Germans were forced back and built trenches for a defensive war.