 Complete the following phrase:  The camp was constructed at the beginning of World War I by the Germans. Initially the German military command believed that the war would last no more than a few weeks and even if the campaign in the west lasted longer, the expectation was that the Russians would not be able to mobilize large forces for some time. However the Russian Empire began an offensive in Eastern Prussia soon after the commencement of hostilities and the German army was forced to relocate substantial forces to the east. After crucial strategic mistakes by Russian generals at the Battle of Tannenberg and the 