June 18—German submarine sinks British steamer Ailsa off Scotland, crew being saved.
June 19—German Admiralty states that the submarine U-29, commanded by Captain Weddigen, which was destroyed weeks ago, was rammed and sunk by a British tank steamer flying the Swedish flag, after the tanker had been ordered to stop; British Government makes an official statement that the U-29 was sunk by "one of His Majesty's ships"; German submarine sinks British steamer Dulcie, one of the crew being lost.
June 20—German submarine torpedoes British cruiser Roxburgh in the North Sea; the damage is not serious and the cruiser proceeds to port under her own steam.
June 21—German submarine sinks by gunfire the British steamer Carisbrook, crew being saved.
June 22—It is officially announced at Petrograd that Russian submarines have sunk a large Turkish steamer and two sailing vessels in the Black Sea.
June 23—German submarine torpedoes and then burns Norwegian steamer Truma, near the Shetland Islands, crew being saved.
June 26—Austrian submarine torpedoes and sinks an Italian torpedo boat in the Northern Adriatic.
June 27—German submarine sinks British schooner Edith, crew being saved.
June 28—German submarine U-38 sinks the British steamer Armenian, of the Leyland Line, off the Cornwall coast, twenty-nine men being lost and ten injured; among the dead are twenty Americans, employed as attendants for the horses and mules composing the chief portion of the Armenian's cargo; recital of one of the crew of the British submarine E-11—the vessel which entered the Sea of Marmora and the harbor of Constantinople, her commander being given the Victoria Cross and each of the crew the Distinguished Service Medal—shows that the E-11 sank one Turkish gunboat, one Turkish supply ship, one German transport, three Turkish steamers, and six Turkish transports.
June 29—German submarine sinks British steamer Scottish Monarch, fifteen of crew being lost; German submarines sink Norwegian steamers Cambuskenneth and Gjeso, and Norwegian sailing vessel Marna; the crews are saved.