Your friend, DONALD E. HUDSON, was in the 103rd. Infantry Division, which included three Infantry Regiments, 409, 410 and 411, plus other standard units (artillery etc.).
The division was activated 15 Nov 42 at Camp Claiborne, LA, then moved to Camp Howze (Gainsville), TX, 22 Nov 42. Prior to overseas departure, it staged at Camp Shanks, NY 24 Nov 44, and sailed from NY P/E Oct 44; arrived France 20 Oct 44 and entered Germany 23 Mar 45 and Austria 2 May 45; returned to NY P/E 18 Sep 45, and was inactivated at Camp Kilmer, NJ 20 Sep 45.
Rhineland 15 Sep 44 / 21 Mar 45 Ardennes-AlsaceN/A fr DEH Central EuropeN/A for DEH
Major General Charles G. Haffner, Jr., from Nov 42 / Jan 45.
Killed in Action 720 Wounded in Action 3,329 Died of wounds 101
(Stephen E. Ambrose in his CITIZEN SOLDIERS reported casualties at 66.5%, entered combat 11 Nov 44 and days in combat at 147).
The division arrived at Marseille, France on 20 Oct 44, and relieved the 3rd. ID at Chevry 8-9 Nov 44. It attacked toward St. Die in the Vosges Mountains 14 Nov 44, and fought through strong opposition to clear the hill mass below the town, crossed the Meurthe River 20-21 Nov 44, and took the evacuated objective of St. Die the next day with the 409th. IR. The division then outflanked Steige Pass 23-24 Nov 44, and followed in the wake of the 14th. Armored Division toward Selestat, which it helped clear in house-to-house fighting 2-4 Dec 44.
I am sorry to state that I would assume that Donald died somewhere between Steige Pass and Selestat 30 Nov 44.
My reference for the combat narrative follows:
WORLD WAR II ORDER of BATTLE, Shelby L. Stanton, author, Galahad Books, NYNY, publisher.
The Ambrose reference was published by Simon & Schuster, NYNY.
I hope that this is at least a part of the information you wished to retrieve.