Pedzisa mutsara unotevera: Pakuunganidza, XX Corps yakapiwa ku8th Army kuti idzivirire East Prussia apo vamwe vose veHondo vakaita chirongwa cheSchlieffen Plan muna August 1914. Yakapinda muhondo dzeGumbinnen, Tannenberg ne1st Masurian Lakes. Nokukurumidza pashure pe1st Masurian Lakes yakabatana ne9th Army muLower Silesia uko yakarwisana pa
Hondo yeRwizi rweVistula. Pakazosvika Chivabvu 1915 yakanga yadzoka ne8th Army uye musi wa 26 Chivabvu mutungamiri weXX Corps, General der Artillerie Friedrich von Scholtz, akaitwa mutungamiri wemauto, achiri kuchengetedza kutungamira kweCorps yake panguva imwe chete. Pana 29 September 1915, dzimbahwe re8th Army rakaparadzwa. Musi wa 18 Gunyana 1915, XX Corps yakagadziridzwa kuti iumbe "Armee-Gruppe" Scholtz, yakazotevera "Armee-Abteilung" Scholtz, sechikamu cheMauto eNiemen.