Spa Conference (29 September 1918)
The Spa conference of September 29, 1918 is the last important conference between the main political and military leaders of the German Empire, then engaged in the First World War. Held in the last weeks of the conflict, it is intended to draw the political and military conclusions of the Bulgarian defection.
Source: Wikipedia — Spa Conference (29 September 1918) (CC BY-SA 4.0)