It is very difficult to say. The owner of the paybook Otto Voss was from 01.09.1914: "2. Ers. Batl. 1. Garde Fußartl. Reg. Battr. Nr. 24", from November 1914 it changed in "2. Res. Fussartl. Battr. No 24", March 1916 "Fussartl. Battr. Nr. 112 (10 cm K. 04)", July 1916 "1. Garde-Fuß-Artillerie Regiment Ersatz-Bataillon II. Rekruten Depot", September 1916 "Kgl. Preuß. Fußartl.-Batterie 621", October 1916 " Reserve-Feldartillerie-Regiment Nr. 7. III.", Januar 1917 "Kgl. Preuss. Fußartillerie 1.-Batl. Nr. 79", Febuar 1917 "Kgl. Pr. Minenwerfer Ers.-Regt. 1. Bataillon", March 1917 "Kgl. Preuss. Minen-Werfer-Komp. 320" and at last September 1918 "Kgl. Preuß. Minenwerfer-Batl. 19". He starts as a normal soldier and was at the end of the war "Leutnant der Reserve", got EK 2 and EK 1. During the 4 years he was fighting at the eastern front.