Flanders – Second Action of Givenchy until next day: British 7th new arrived 51st Highland Division attack at 0558 hours northeast of Festubert without surprise element after two days of shelling and with inadequate grenades, repeat failures (on June 16 and 18).
Gallipoli: Hamilton vainly asks Kitchener for Byng or Rawlinson as new corps commander.
Germany: Karlsruhe factories bombed by 23 Voisins of GB1 (130 bombs, 84 civilian casualties).
Western Front: French airships Adjt Vineenot and Cmndt Coutelle fly 3 night missions against rail targets (nights June 15-16, 18-19 and 19-20).
Britain: German airship L 10 drops 59 bombs on Tyneside (night 15-16, record of 90 civilian casualties to date).
French decrypts of German Navy radio signals help arrest of seven agents in British ports in two weeks.
Germany: The 24 military region Commanders sent guidelines on worker exemptions and dispute mediation.