April 23—German Admiralty announces that the German high seas fleet has recently cruised repeated in the North Sea, advancing into English waters without meeting British ships; the British Official Gazette announces a blockade, beginning at midnight, of Kamerun, German West Africa; Norwegian steamer Caprivi is sunk by a mine off the Irish coast.
April 24—Finnish steamer Frack is sunk in the Baltic by a German submarine; Norwegian barks Oscar and Eva are sunk by a German submarine, the crews being saved.
April 25—Russian Black Sea fleet bombards the Bosporus forts.
April 26—French armored cruiser Leon Gambetta is torpedoed by the Austrian submarine U-5 in the Strait of Otranto; 552 of her men, including Admiral Senes and all her commissioned officers, perish; Italian vessels rescue 162 men; the cruiser was attacked while on patrol duty in the waterway leading to the Adriatic Sea, and sank in ten minutes after the torpedo hit; England stops all English Channel and North Sea shipping, experts believing that the Admiralty order is connected with the desperate fighting now going on at Ypres; German converted cruiser Kronprinz Wilhelm, lying at Newport News, interns until the end of the war.
April 27—Sixteen battleships and armored cruisers of the Allies attack advance batteries at the Dardanelles, but do little damage; British battleships Majestic and Triumph, damaged, have to withdraw from the fighting line; the fleet is operating in conjunction with the land forces.
April 28—Bombardment of the Dardanelles is continued by the Allies; French armored cruiser Jeanne d’Arc is damaged by fort fire; Captain of a Swedish steamer reports the presence in the North Sea of a German fleet of sixty-eight vessels of all classes.
April 29—British steamer Mobile is sunk by a German submarine off the north coast of Scotland, the crew being saved.
April 30—Allied fleet is co-operating with the troops in their advance on the Gallipoli Peninsula; British battleship Queen Elizabeth directs the fire of her fifteen-inch guns upon the Peninsula under guidance of aviators; a Turkish troopship is sunk; Zeebrugge is bombarded from the sea; British trawler Lily Dale is sunk by a German submarine in the North Sea; British Admiralty announces that the German steamship Macedonia, which escaped from Las Palmas, Canary Islands, a few weeks ago, has been captured by a British cruiser.
April 1—British airmen bombard German submarines which are being built at Hoboken, near Antwerp.
April 2—French aeroplane squadron drops thirty-three bombs on barracks and aeroplane hangars at Vigneulles, in the Woevre region; French and Belgian aviators drop thirty bombs on aviation camp at Handezaema; allied aviators drop bombs on Muehlheim and Neuenberg, doing slight damage; Adolphe Pegoud, French aviator, attacks and brings down a German Taube near Saint Menehould by shooting at it; he captures the pilot and observer, unhurt.