You might want to order his deceased file. You'll find practical instructions at message #2112 (go to back to the main page, enter "2112" in the box in the upper right corner labeled "Go to # ____" and click on "Go").
Possible sources for a detailed account of the action in which he was killed near Zeppelin Stadium:
45th Infantry Division Association 2145 Northeast 36th Street Oklahoma City, OK 73111-5302 (405)424-5313
The 180th Infantry had a regimental association but I'm not sure whether it's still active. I have two numbers: Jerry Smith at (918)623-1436; Larry Traw (580)924-6693. Perhaps they can help.
The above may also be able to assist in locating individuals who served with your uncle.