Re: 129th Anti-Aircraft Artillery Battalion ????
Just a bit of added info you may not have. The 129th AAA Gun Battalion arrived in Luxembourg Oct 21, 1944. Each Battery had  90MM guns and about 120 men. A Purple Heart medal memorial plaque for 1st Lieutenant Clarence Jaeggli 129th AAA Gun Bn was unveiled on May 11, 2006 at Vroenhoven. He had been killed by enemy fire near a blown bridge on the Albert Canal September 10, 1944.
Good luck in your searce for members, Bill