sentences:  On the outbreak of the First World War, "D5", along with the rest of her class, was assigned to the 8th Submarine Flotilla.The Flotilla, including "D5" was assigned to patrol in the east end of the English Channel during the passage of the British Expeditionary Force to France in early August.On 21 August 1914, "D5" was on patrol west of Heligoland when she spotted a force of German warships that were carrying out a sortie into the North Sea against British fishing vessels.