Where can I find a list of soldiers who liberated Dachau?

My grandfather was a soldier who liberated Dachau. I have been looking on sites to find pictures, testimonies, or anything else to do with him and his soldiers. His name is Henry Rothman. Is there a government site that I can go on or a military site? TEN POINTS AVAILABLE!! This is EXTREMELY important to my family and I. THANK YOU!!!