Western Front
Kaiserschlacht: Much artillery and aerial activity along front.
Metz station bombed by British airmen: Metz-Sablon main station, goods sheds and train hit by 12 DH4s of 55 Squadron (c.90 casualties). Later, 1 Handley Page and 10 F.E.2s (2 lost) attack Thionville (much damage, 35 killed) and Metz-Sablon (night May 17-18).
An F.E.2b prepares for a night mission:
https://i0.wp.com/ww2-weapons.com/w...ssion.jpg?ssl=1
Southern Front
Albania: Franco-Italian troops drive back Austro-Huingarians west of Koritsa and advance 12 miles.
Naval and Overseas Operations
Western Mediterranean: French convoy escort
Ailly sinks
UC-35 (destroyed 42 ships worth 65,569t) with gunfire off Sardinia, Germans believe Q-ship the killer.
Asiatic and Egyptian Theaters
Palestine: Arab troops raid Turkish post at Wadi Jerdun (Palestine) on Hejaz railway.
Mesopotamia: British mounted troops occupy Fatha on Tigris, 45 miles north of Tekrit; Turks retire north.
Political, etc
United Kingdom: All men born 1898 or 1899 called up.
Compulsory meatless day abolished. President of Board of Trade estimates half industry on war work, output below pre-war.
"Denaturalisation of Dangerous Aliens" Bill issued.
Ireland: Sinn Fein leaders arrested in Ireland and interned (see 25th): Sudden arrest of about 150 Sinn Fein leaders in Ireland for “plotting with Germany”. only Michael Collins and Cathal Brugha escape, but no prosecutions.
United States: New York City policemen riding a motorcycle with a machine gun:
https://twitter.com/CenturyAgoToday...802490325757952