Home Fronts
France: 400 St Chamond tanks ordered by War Ministry. During April Colonel Estienne in command of first assault artillery unit (Schneider tanks) near Marly-le-Roi.
Western Front
Verdun – West bank: French evacuate Bethincourt salient.
Middle East
Armenia: 5,000 Russians (sailed from Novorossiysk in 22 ships on April 5), land near Humurgan.
Sea War
Adriatic: French submarine sinks Austrian transport.
Air War
Western Front: First Fokker Eindecker makes forced landing behind BEF lines; MG interrupter gear salvaged. Aircraft test-flown at CFS Upavon (British Central Flying School) on May 30.
Eastern Front: Russian AA guns drive off German aircraft over Tsar’s review of IX Corps.