20.—Costa Rica breaks with Germany.
21.—Gen. Tasker H. Bliss named Chief of Staff of the United States Army.
25.—Guynemer, famous French flier, killed.
26.—Zonnebeke, Polygon Wood and Tower Hamlets, east of Ypres, taken by British.
28.—William D. Haywood, secretary, and 100 members of the Industrial Workers of the World arrested for sedition.
29.—Turkish Mesopotamian army, under Ahmed Bey, captured by British.
October
6.—Peru and Uruguay break with Germany.
9.—Poelcapelle and other German positions captured in Franco-British attack.
12-16.—Oesel and Dago, Russian islands in Gulf of Riga, captured by Germans.