Rubuta ci gaba don wannan sakin layi - Von Hertzen ya zama ɗaya daga cikin masu sa kai na farko don shiga Jager Battalion a ranar 3 ga Maris 1915. Ya shiga cikin fadace-fadace a yakin duniya na farko a gabashin gabashin Jamus a cikin yaƙe-yaƙe na Misse River, Gulf of Riga da kuma yakin Kirsimeti
a kogin Aa.