Not knowing exactly what you're looking for, there's a very large group of units you would have to sift through. I would try any forums or message boards for 2nd and 7th Armored Division's, or the 30th and 104th Infantry Divisions. They were the majority of the soldiers that were in the Geleen area in late 1944 during the Market Garden operations and afterword. Some where there for a month and some only a few days. Typical is the 702nd Tank Destroyer Battalion, here's their after action report for Sep/Oct 1944-
http://www.royalartilleryunitsnetherlands1944-1945.com/702-u...and a Royal Artillery Regiment that was in Galeen-
http://www.royalartilleryunitsnetherlands1944-1945.com/7-med...This will help explain American troop movements in Holland and why it's so hard to find information on them.
http://7tharmddiv.org/us-troops-in-holland.htm2nd Armored Association-
http://2ndarmoreddivision.org/7th Armored Division deaths showing subordinate units-
http://7tharmddiv.org/7adeaths.htm