Neutral period. August 1914-April 1916.
Critical period. April 1916-April 1917.
After intervention. April 1917-December 1918.
Appendix (p. [89]-97): Extracts from speeches of Counts Hertling and Czernin, January 24, 1918. German peace note, October 4, 1918. German reply (October 12) to American note of October 8, 1918. German reply (October 20) to American note of October 14, 1918.