Sham Battle Scenes.  “Over the Top”;  A “Tank” in Action; Firing a field piece; Artillery firing; Old Glory in action.  Published by S. Gold.  U.S. Naval Station Photographer, North Chicago, ILL   Copyright 1917.

Post marked Great Lakes, ILL. Jul 7, 1918.  Addressed to Mrs. L.G.[Lee G. / Florence Koontz] Weaver, 92 Tireman, Detroit, Michigan.

“7-6-18  Hello Sis, Sure are having a fine time.  We only got dress up today and now you sailor Bill you should see me.   As ever, Bill [William P. Koontz]. Co 344, Barracks E. 852, Camp Decateur, Great Lakes, ILL”

Uncle Bill was Grandma Florence’s younger brother.  He was serving in the Navy during WW I.   This was from when he was stationed at the Great Lakes Naval Center in Chicago.