. . . . "inconclusive action" . . . "an attack" . . "1 Zeppelin" . . "battle" . "2 submarines" . . . . "Indecisive" . . . . . "4 destroyers" . . "Action of 4 May 1917" . . "Action of 4 May 1917" . "1917-05-04" . "2 light cruisers" . . . "4 May 1917" . . "Action of 4 May" . "None" . . . . "an action in the North Sea" . . . . "attacked" .