Germany: U-boat leader Bauer orders his commanders ‘… unrestricted U-boat warfare is to force England to make peace and thereby decide the whole war. Energetic action is required and above all rapidity of action … expend only one torpedo on each ship stopped …’. Dover Straits route now compulsory to maximize time on station.
Somme: British take position near Le Transloy and capture 350 strong garrison.
Japan: Government asks Britain to approve her assuming German rights in China (done February 16).