 Complete the following phrase:  With the outbreak of the First World War and the formation in July 1914 of the units of the Vilnius District of the 1st Army Russian Empire, Captain Wilhelm Garf took over the position of senior adjutant of the Quartermaster General of Staff. As part of the Northwestern Front, the 1st Army Russian Empire, under the command of General Paul von Rennenkampf, entered East Prussia on August 4, 1914. Already in the first weeks of the war, William Garf distinguished himself in the 