Mezue ahịrịokwu na-esonụ: N'ịkpọkọta ndị agha, e kenyere XX Corps na ndị agha nke asatọ iji chebe East Prussia ebe ndị agha ndị ọzọ na-eme ihe ike nke Schlieffen Plan na August 1914. Ọ sonyere na agha nke Gumbinnen, Tannenberg na 1st Masurian Lakes. Ozugbo 1st Masurian Lakes ọ sonyeere ndị agha nke 9 na Lower Silesia ebe ọ lụrụ ọgụ na
Agha Osimiri Vistula. Ka ọ na-erule Mee 1915, ọ laghachiri na 8th Army na na 26 Mee onye isi nke XX Corps, General der Artillerie Friedrich von Scholtz, ka emere onye isi ndị agha, ebe ọ na-ejigide otu iwu nke Corps ya. Na 29 Septemba 1915, e mebiri isi ụlọ ọrụ nke ndị agha nke asatọ. Na 18 Septemba 1915, a kwalitere XX Corps ka ọ bụrụ "Armee-Gruppe" Scholtz, emesịa "Armee-Abteilung" Scholtz, dịka akụkụ nke ndị agha nke Niemen.