Rubuta ci gaba ga wannan sakin layi - Ta hanyar fashewar yakin duniya na farko, Fulton ya ci gaba a matsayin mai girma. 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 ta tashi daga Wellington a ranar 15 ga watan Agusta da kuma mamayar Samoa na Jamus
An samu nasara ba tare da zubar da jini ba a ranar 29 ga watan Agusta lokacin da 'yan New Zealand 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.