. "Allied victory" . "United Kingdom" . "Black May (1943)" . . "Germany" . "\\\"Black May\\\"" . . . . "Black May" . . "May 1943, as Allied counter-measures became increasingly effective" . "58 ships sunk" . . "Merchant navy" . . "Canada" . "1943-05-24" . . "defeats of May 1943" . . . "a major defeat" . "Royal Navy" . "\\\"Black May\\\", 1943" . . "a series of major convoy battles" . . "'Black May'" . "240 submarines" . . . . "Black May (1943)" . "May 1943" .