Show MAY CHECK submarines believed U boat base on north sea can be stamped out washington the crench assault on the german right flank lias has made a profound impression biere because in the judgment of many american army officers it is directed at the most vulnerable point on the entire gernian front complete success for the allies swooping sweeping the german line back from the sea along the entire belgian coast would be an immediate answer to the U boat warfare the main north sea bases tor for U boat operations would be stamped out behind that achievement then would stand the possibility that the entire german line in france could be endangered by a flank attack |