Stewie, I think I read it on Mudcat, and to my amusement, I did a search on "comes marching home" and found:

"0.8169 - Thread - Message - RE: When Johnnie comes marching home - Jan 16 2000 7:14PM -   Stewie

    Summary: It is interesting that the Traditional Ballad Index researcher speculates that 'Johnny, Fill Up the Bowl', which shares the tune, probably came first. Scholars continue to argue whether "When Johnny Comes Marching Home" or the doleful "Johnny, I Hardly Knew Ye" is the original. "When Johnny Comes Marching Home" can be firmly dated to the beginning of the Civil War, while "Johnny, I Hardly Knew Ye" does not appear until slightly later (1869) -- but as a traditional song."

... Looks as if it was your post????? Ah well. I didn't go back and read the whole thread. So the "strong evidence" was apparently just your dating of the two songs unless there's more in the thread. Glad you challenged what I said.

Rita F