. . . . "a second successful period" . . "second happy time" . "Germany" . . . "Canada" . . . "Operation Paukenschlag" . "operate along the East Coast" . "Second Happy Time" . "a period of disastrous shipping losses" . "\\\"second happy time\\\"" . "German submarines" . "Operation Drumbeat" . "being attacked" . . "Paukenschlag" . . . . "operating off the east coast of the United States" . "submarine attacks off the East Coast" . . "U-boat blitz" . "United States" . "''Unternehmen Paukenschlag'' (\\\"Operation Drumbeat\\\")" . . "the German navy ravaged Allied shipping off the American Atlantic coast" . . "''Drumbeat''" . . . "1942" . "Second Happy Time" . "''Operation Drumbeat''" .