My brother found info on our great Uncle at Cantigny park in Wheaton Illinois. He was in the 129th Inf. , and was killed in France ,1918. They have alot on Illinois WW1 units so maybe they can help you, the website is= <A HREF="http://www.rrmtf.org/firstdivision/">http://www.rrmtf.org/firstdivision/</A> If this doesn't work just type in keyword search "Cantigny".