 Although the monthly total of tonnage sunk by all U @-@ boats had peaked in April , the losses were over 600 @,@ 000 tons in each of May and June . U @-@ 70 did not contribute to the May tally but her commanding officer , Wünsche , was awarded the House Order of Hohenzollern . U @-@ 70 began another productive month in June by sinking the American Line ocean liner Southland on 4 June . At 11 @,@ 899 GRT , Southland was the largest ship sunk by U @-@ 70 , and one of the largest ships sunk during the war by a U @-@ boat . Southland was carrying a general cargo from Liverpool to Philadelphia when U @-@ 70 sank her at position 56 ° 10 ′ N 12 ° 14 ′ W , some 140 nautical miles ( 260 km ; 160 mi ) from Tory Island . Throughout the rest of June , U @-@ 70 sank another seven ships totaling 26 @,@ 131 tons . 
