26th May 1917
Western Front
Three German attacks in Champagne, all successful.
Southern Front
Italians take and lose Kostanjevica, but capture 10 guns.
Aviation(should have been posted yesterday)
French ace Lieutenant René Dorme is killed in action. His 23 victories will tie him with Lieutenant Gabriel Guérin for ninth-highest-scoring French ace of World War I.
Naval and Overseas Operations
British hospital ship HMHS Dover Castle is sunk by the German submarine
UC-67, resulting in 7 crew deaths.
Political, etc.
Mr. Balfour arrives in Canada.
French Minister of Marine states Germans have sunk 2,400,000 tons in first four months.
Brazil annuls its neutrality decree.
Japanese immigration to the U.S. increases due to the need for laborers at farms, caused by food shortages.
Ship Losses:
Abd es Salaam (France) The sailing vessel was sunk in the Mediterranean Sea off Sicily, Italy by
SM UC-20 ( Kaiserliche Marine).
Agragas (Italy) The cargo ship was sunk in the Mediterranean Sea off Syrte, Libya by
SM UC-73 ( Kaiserliche Marine). Her crew survived.
Angelo Padre (Italy) The sailing vessel was sunk in the Tyrrhenian Sea off Policastro Bussentino, Campania by
SM U-65 ( Kaiserliche Marine).
Aristides (Greece) The cargo ship was sunk in the Bay of Biscay 5 nautical miles (9.3 km) north north west of Cabo del Ajo, Spain by
SM UC-21 ( Kaiserliche Marine). Her crew survived.
Carlos de Eizaguirre (Spain) The ship struck a mine and sank off Cape Town, South Africa with the loss of 84 of the 108 people on board.
Dandolo (France) The sailing vessel was sunk in the Mediterranean Sea off Sicily by
SM UC-20 ( Kaiserliche Marine).
Detlef Wagner (United Kingdom) The barquentine was shelled and sunk in the Atlantic Ocean 5 nautical miles (9.3 km) west of Ar Men, Finistère, France by
SM UC-72 ( Kaiserliche Marine). Her crew survived.
Dorothy (Greece) The cargo ship was sunk in the Mediterranean Sea 45 nautical miles (83 km) off Cap d'Armi by
SM UB-43 ( Kaiserliche Marine).
HMHS Dover Castle (Royal Navy) The hospital ship was torpedoed and sunk in the Mediterranean Sea 50 nautical miles (93 km) north of Bône, Algeria (37°45′N 7°36′E) by
SM UC-67 ( Kaiserliche Marine) with the loss of seven crew. Survivors were rescued by
HMS Cameleon ( Royal Navy).
Holmesbank (United Kingdom) The collier was shelled and sunk in the Mediterranean Sea 90 nautical miles (170 km) north by west of Alexandria, Egypt (32°26′N 29°30′E) by
SM U-38 ( Kaiserliche Marine). Her crew survived.
Lucipara (Russia) The barque was sunk in the Atlantic Ocean 45 nautical miles (83 km) north west of Inishtrahull Island, County Donegal, United Kingdom (55°55′N 8°25′W) by
SM U-87 ( Kaiserliche Marine).
Manoubia (France) The sailing vessel was sunk in the Mediterranean Sea off Sicily by
SM UC-20 ( Kaiserliche Marine).
Messaouda (France) The sailing vessel was sunk in the Mediterranean Sea off Sicily by
SM UC-20 ( Kaiserliche Marine).
Norhaug (Norway) The cargo ship struck a mine laid by
UC 21 (Reinhold Saltzwedel) and sank in the Bay of Biscay 10 nautical miles (19 km) west of Saint-Nazaire, Loire-Atlantique, France (47°13′N 2°33′W) with the loss of five of her crew.
Norway (Norway) The cargo liner was sunk in the Norwegian Sea 11 nautical miles (20 km) west of Holmengrå, Finnmark by
SM U-19 ( Kaiserliche Marine). All passengers and crew survived.
Risorgimento (Italy) The schooner was scuttled in the Mediterranean Sea south of Sardinia (38°13′N 9°46′E) by
SM UC-35 ( Kaiserliche Marine).
Saint Hubert (France) The barque was scuttled in the English Channel 6 nautical miles (11 km) north north west of Cap La Hague, Manche by
SM UC-45 ( Kaiserliche Marine).
Saint Mirren (United Kingdom) The full-rigged ship was shelled and sunk in the Atlantic Ocean 45 nautical miles (83 km) north west of Inistrahull Island (55°55′N 8°25′W) by
SM U-87 ( Kaiserliche Marine). Her crew survived.
San Francesco (Italy) The sailing vessel was sunk in the Mediterranean Sea off Sicily by
SM UC-20 ( Kaiserliche Marine). Her crew survived.
Umaria (United Kingdom) The cargo ship was torpedoed and sunk in the Tyrrhenian Sea 20 nautical miles (37 km) south west by south of Policastro Bussentino (39°48′N 15°12′E) by
SM U-65 ( Kaiserliche Marine) with the loss of five crew. Three survivors were taken as prisoners of war.
SMS V84 (Kaiserliche Marine) The V25-class destroyer struck a mine and sank in the North Sea with the loss of five of her crew.