Messines as I saw it, 9 June 1917, Major Edwin Summerhayes. Image courtesy Australian War Memorial.
- John Wright of Burnt Yards is killed in the Battle of Messines
- The Australian destroyers HMAS Warrego, HMAS Parramatta, HMAS Yarra, HMAS Swan, HMAS Torrens and HMAS Huon leave Sydney for service in the Mediterranean. The vessels are sent in response to an urgent request from the British government for assistance in dealing with the increasing threat posed by German U-boats. The Australian Destroyer Flotilla, as the fleet became known, would be based in Brindisi in Italy as part of the Otranto Barrage, the Allied naval blockade of the Otranto Straits between Brindisi and Corfu on the Greek side of the Adriatic Sea.
- The Russian Provisional Government rejects a German proposal for an unlimited armistice
