Spa Conference (2-3 July 1918)
The Spa Conference of 2-3 July, 1918, called "the great Spa conference" by Fritz Fischer , was the second of the four main meetings between the political and military leaders of the German Empire. The conference was held in the summer of 1918, between Operation Michael and the Second Battle of the Marne, the two major German offensives at the end of the First World War.
Source: Wikipedia — Spa Conference (2-3 July 1918) (CC BY-SA 4.0)