Ka kammala wannan magana: A lokacin da aka soma Yaƙin Duniya na Ɗaya, Fulton ya zama Manjo. A New Zealand a kan izinin lokacin da Birtaniya ta yi yaƙi da Jamus a ranar 4 ga Agusta, 1914, ya ba da sabis ga gwamnatin New Zealand a rana mai zuwa. An sanya shi a matsayin mukaddashin Laftanan-Colonel, an sanya shi a matsayin kwamandan rundunar soji wanda zai kasance wani bangare na rundunar Sojan Samawa (SEF) da aka yi niyyar mamaye Samoa ta Jamus. a cikin amsa ga bukatar gwamnatin Burtaniya. SEF ya tashi daga Wellington a ranar 15 ga watan Agusta kuma SEF ya tashi daga Wellington a ranar 15 ga watan Agusta.
An sami mamayar Samoa ta Jamusanci ba tare da zubar da jini ba a ranar 29 ga Agusta lokacin da New Zealanders suka sauka a Apia. Bayan da ya yi aiki na tsawon watanni, babban ma'aikata na SEF ya koma New Zealand a watan Afrilu 1915.