Your father's unit, 787th Tank Battalion, was attached to the 86th Infantry Division on 2 May 45, probably in the vicinity of Wasserberg, Geramny, which is about 25 miles west of Munich, but was almost immediately ordered to Salzburg, Austria.
The division, including your dad's unit, remained in the region until war's end, 7 May 45.
The division as a unit entered combat 29 March 45;
it was in combat 34 days; it lost 760 Killed in action; 473 Wounded in Action; 473 Died from Wounds; a casuality rate of approximately 8-10%.
Overseas Assignment: XV Corps, 2 May 45 (in the 787th time frame).
Division Commanding Officer: Major General Frank L.Culin, Jr., Apr 44.
History prior to combat period:
The 787th Tank Battalion was activated 10 Sep 43 at Camp Chaffee, Ark., as 3rd. BN, 16th Armored Regiment; departed NY POE 2 Mar 45; arrived France-ETO 12 Mar 45. inactivated at Fort Jackson, SC , 21 Feb 45.
Campaign: Central Europe.
This is about all of the information I can provide.