St. mihiel information & film footage
Dave and Jim Mason were present for the fighting that took place at St. Mihiel on September 12th, 1918. Dave Mason's September 14th letter to his mother and Hubert 'Pot Hound' Dawson's recollections describe their experiences there.
From Wikipedia: For the St. Mihiel Campaign, the division moved into an area south of Verdun as part of the 1st American Army. Gen. Pershing, commander of the American Expeditionary Force (AEF), had gotten the French and British to agree that the AEF would fight under its own organizational elements. One of the first missions assigned to the AEF was the reduction of the St. Mihiel salient. The 4th Division, assigned to V Corps, was on the western face of the salient. The plan was for V Corps to push generally southeast and to meet IV Corps who was pushing northwest, thereby trapping the Germans in the St. Mihiel area.
Also, here are links to descriptions of this battle from German General Max von Gallwitz and a September 28, 1918 essay in The Independent...
If the film footage doesn't appear below, you can copy and paste this web address to watch it: http://youtu.be/jvxEtVq0Wng