 Pari gbolohun ti o tẹle: A bi Galler sinu idile Baltic German ti onimọ-ẹrọ ologun Philipp Michael Hugo von Haller Galler o si darapọ mọ Baltic Fleet lori pari ile-iwe Naval ni 1905. Lakoko Ogun Agbaye akọkọ o jẹ oṣiṣẹ ọta ibọn squadron ti Ẹka Ogun, oṣiṣẹ alakoso ti Slava ati paṣẹ fun apanirun Turkmenets Stavropolski. Lẹhin ti Oṣu Kẹwa Iyika o darapọ mọ awọn Bolsheviks ati ki o kopa ninu awọn : Ìrìn-àjò ojú omi tí wọn ń pè ní Ice Cruise of the Baltic Fleet. Nigbamii, o paṣẹ fun apanirun Mecheslav, ọkọ oju omi ogun Andrei Pervozvanny ati lẹhinna jẹ olori ti awọn oṣiṣẹ ti Baltic Fleet lakoko Ikọja Ilu Gẹẹsi ni Baltic 19181919. 