As far as I know there is nothing online which would help regarding "the wounded soldiers", Sarah. Online databases with which I am familiar are limited to individuals killed during the war.
You said your aunt, "read the information off of his paperwork". What was that "paperwork"? His discharge? Depending upon what, exactly, it is you're trying to find out, that "paperwork" may be your best available source. There are certainly other avenues to pursue, but I would think it best to determine exactly what it is she has, and what it might provide, before spending a lot of time and energy looking elsewhere.