. "1 battleship damaged" . . "assaulted the Gulf of Riga" . . . "1 minelayer" . "Allied victory" . . "5 light cruisers" . "United Kingdom" . "Gulf of Riga" . . . . "150 killed, wounded and captured" . "unsuccessfully in August 1915" . "first incursion into the Gulf of Riga" . . . . "these operations" . "attack on Riga" . . "14 minesweepers" . . . . "1 armoured cruiser" . "16 destroyers" . "4 battleships" . . . "1 battleship" . . . "the operation" . . "6 submarines" . "operations" . "4 gunboats" . "2 gunboats sunk" . . . "Battle of the Gulf of Riga" . "Battle of the Gulf of Riga" . . "3 battlecruisers" . "56 torpedo boats" . . . . . "break into the Gulf of Riga" . "1 destroyer damaged" . "1915-08-20" .