Irish Sea: UC-44 sunk on UC-42 mines off Waterford after Room 40 sends bogus signal in code Germans discovered to be breaking. New FFB signal book recovered from wreck by diver-shipwright E C Miller.
Britain: Last 2 of 51 wartime-built R-class destroyers launched (since 14 May 1916), 11 modified R-class also built in
1917. First of 25 V-class destroyers (ordered June-August 1916) come into service (August 1917-June 1918).
Liberia: Government declares war on Germany.
France: French accept formation of Czech Army on Western Front (talks since June 20); 2,000 volunteers by November.
Norway, Holland: Governments offer shipping to Allies in return for food.
Britain: 3,000 Russian troops for Western Front land at Invergordon. King and Queen attend Westminster Abbey 3rd War Anniversary Service. National War Aims committee launched (3,192 constituency meetings by October).
Russia: General Gourko arrested at his Petrograd home, kept in Fortress of Peter and Paul (until September 19) until allowed to sail for England.