This problem is complicated, so you need to disassemble before answering. After that, it will be easier to understand the exact context of considering this issue in this article. Two questions were actually asked by asking "why the Western Front is stalled". First of all, why the deadlock began and why the deadlock lasted from 1914 to 1918? The second problem is the part specifically mentioning the deadlock between "Germany and France".
(Aka Westline) Westline is the war between England, France and Italy. The first stage was Germany losing France in 1940, followed by a German bombing against the United Kingdom ("The Battle of Britain"). The second stage of the large-scale battle began in 1943 when the Allies invaded Sicily. Through this action Mussolini was laid off and invaded Italy in 1944. The next phase landed in Normandy (D) in June 1944, the Allied troops landed in Germany until May 1945. Since the Germans invaded Russia in 1941, the Soviets who suffered the first attack by the German army asked to enter the second front in the west. Millions of Soviet died, as they have spent quite a lot of time, it is one of the reasons for friction between them. It was the alliance and triggered the last Cold War
World War I was done in various ways. After Belgium entered France, Germany first developed a two-year deadlock along the western line. The worst deadlock during that time was Verdun, which sacrificed the life of about one million people and did not bring about any change in either side position.
After the outbreak of the First World War in August 1914, the battle in Western Europe quickly became a groove spreading along the forefront, and in Belgium and France some nearly 1,000 kilometers spread. On one side of this "Western Front" there are France and British troops (and allies like Canada) and the other German. From the grooves across from them, they met each other and passed through the dark "unmanned land" with barbed wire and cannon craters. These powerful defensive positions are well protected by machine guns, snipers and artillery. It makes decisive breakthrough of enemies very difficult. Military leaders have worked hard to design effective tactics to cope with the reality of this new type of war. But the plan is to break through the stalemate and the UK and France will raise funds for "great driving force" and finally break the German defense