"On This Date in Cryptologic History" Calendar
1918: U.S. Offensive on the Saint-Mihiel

12 September 1918: U.S. offensive on the Saint-Mihiel salient, France.
On this day in 1918, the American Expeditionary Force (AEF) under the command of General John J. Pershing launches its first major offensive operation as an independent army during World War I.