Answer:
World War 1 became static trench warfare.
Step-by-step explanation:
The abiding image of World War 1 is of two sides in deadlock, facing each other across no man’s land. It is of soldiers dug into opposing lines of trenches, from which they launched repeated attacks resulting in very little gain and massive casualties. There is much truth in this image but, like all popular images, the reality was more complicated. When war broke out in 1914 neither side imagined a war fought in trenches and lasting several years. The Germans planned a war in which their armies would sweep through Belgium and Northern France and defeat the French armies within a matter of weeks. Germany would then be free to transfer its troops to the East to defeat Russia. This was the famous Schlieffen Plan. France planned to launch an invasion across the German border into Alsace Lorraine; the so called Plan 17. In Britain it was popularly believed that the war would be over by Christmas 1914.