Verdun: Germans carry trench on Mort Homme southern slope and contain French 65th Division attack on Caillette Wood.
Trentino: Last Austrian bid to break through after army orders says only 3 mountains block way to Milan, I Corps’ 20 battalions, around Mt Lemerle at narrowest point of Asiago forest, crumple under Italian fire (and on June 16 and 18).
Royal Navy first operates shore-controlled minefields (hydrophone and magnetophone) mainly in Flanders and Shetlands (sink 2 U-boats; 2 possible, 2 damaged). Paravanes begun to be fitted to merchant ships (code name Otto), 274 by end of hostilities.
Arabia: 3 seaplanes from HMS Ben-My-Chree bomb Turks at Jeddah.
USA: Wilson renominated Democrat president candidate.