- Charles Alfred Gage is killed in action in France
- 1,300 Anglo-French troops land at Piraeus in Greece in an attempt to dethrone King Constantine I and reinstate former Prime Minister Eleftherios Venizelos. Chaos erupts, with the hunting down, torture and massacre of Venizelos’ supporters. The Allied troops are forced to retreat.
- German submarines bombard Funchal Port at Madeira, sinking three ships
- British and French Governments agree on a co-ordinated approach to shipping – the Runciman-Clementel Agreement
- to unite British ships in French service to those already employed
- to co-ordinate Allied tonnage
- to create inter-allied bureau to centralise charter of neutral shipping