First depth charge submarine kill: Q-ship Farnborough (Campbell) sinks U68 off Southwest Ireland. Germans aware of new weapon after vain attacks on April 15 and 20.
Aegean: Royal Navy minesweeper Whitby Abbey tows 6 caiques into Bay of Lebedos (south of Smyrna) and lands 36 Greek irregulars; they kill or capture 6 Turk soldiers and rustle 600 livestock (British convinced Turk cattle going to Germany).
French submarine Ampere attacks Austrian hospital ship Elektra in error, forced to beach but with few casualties.
East Africa: Germans retreat 20 miles behind river Ruwu to Lembeni, leaving behind Königsberg gun.
Eastern France: Germans conscript 2,000 workers from Roubaix; Lille Gouverneur invites local unemployed to ‘volunteer’ on March 25.