According to Nelson, he had run out of ammunition, ran a couple hundred yards under enemy fire, climbed on top of an abandoned German tank and fired the machine gun at the enemy to allow his men to advance.
Both Harold Nelson and Audie Murphy appear to have been in the 3rd ID but in different regiments.
The article on Nelson doesn’t say exactly where his fight occurred.
Audie Murphy received the MoH for action in the Colmar Pocket which was about midway between Basel and Strasbourg.
Both were part of 7th Army which my dad was in, in an anti-aircraft unit. 7th Army took the brunt of “Operation Northwind”, the second act of the Battle of Bulge and last major offensive by the German army.