Kammala jumla mai zuwa: A lokacin da aka tattara, an sanya XVII Corps zuwa rundunar soja ta 8 don kare Gabashin Prussia, yayin da sauran sojojin suka aiwatar da shirin Schlieffen a watan Agustan 1914. Ya shiga cikin yaƙe-yaƙe na Gumbinnen, Tannenberg da 1st Masurian Lakes. Nan da nan bayan na biyun, ya shiga rundunar soja ta 9 a Lower Silesia, inda ya yi yaƙi a
Yaƙin Kogin Vistula.