▁Le ut nant ▁zur ▁See ▁on ▁ 2 8 ▁September ▁ 1 9 1 0 . ▁ ▁Sp ending ▁another ▁two ▁years ▁in ▁Asia , ▁Für br inger ▁returned ▁home ▁in ▁November ▁ 1 9 1 2 ▁and ▁subsequently ▁he ▁was ▁selected ▁for ▁the ▁U - Bo at ▁training . ▁ ▁World ▁War ▁I ▁ ▁He ▁served ▁ab o ard ▁, ▁but ▁left ▁prior ▁to ▁the ▁U - 2 0 s ▁s inking ▁of ▁ ▁in ▁ 1 9 1 5 . ▁He ▁exclus ively ▁commanded ▁small , ▁coast al ▁U - bo ats , ▁starting ▁with ▁ ▁in ▁February ▁ 1 9 1 5 . ▁He ▁went ▁on ▁to ▁command ▁six ▁subsequent ▁U B ▁and ▁U C - type ▁boats , ▁during ▁which ▁time ▁he ▁was ▁awarded ▁the ▁Iron ▁Cross , ▁Second ▁and ▁First ▁class . ▁He ▁was ▁a ▁successful ▁commerce ▁ra ider , ▁responsible ▁for ▁s inking ▁ 1 0 1 ▁( most ly ▁small , ▁coast al ) ▁ships ▁( total ing ▁ 9 7 , 8 8 1 ▁G RT ) ▁and ▁dam aged ▁five ▁others ▁( of ▁ 9 , 0 3 3 ▁G RT ). ▁His ▁last ▁command ▁was ▁, ▁which ▁was ▁depth - charg ed ▁and ▁ram med ▁by ▁ ▁on ▁ 1 9 ▁July ▁ 1 9 1 8 . ▁The ▁Gar rys ▁command ing ▁officer ▁was ▁Lieutenant ▁Commander ▁Charles ▁Light ol ler . ▁In ▁his ▁post war ▁mem oir s , ▁Für br inger ▁accused ▁Light ol ler ' s ▁crew ▁of ▁opening ▁fire