17th Army Corps (France)
The 17th Army Corps was a French Army corps, which fought in the Franco-Prussian War and both World Wars. During World War I, 17th Army Corps formed part of the Fourth Army. The 9th Balloon company of the U.S. Army Observation Balloon Service in World War I, served with the corps in 1918. The corps was mobilized from 9 September 1939 from the 17th Military Region, and fought the unsuccessful against the oncoming German Army. It was stood down and eventually disestablished after the Armistice of 22 June 1940.