It is Greenville, Ala.
I found a date of Aug. 31, 1864 written on the same card and the capitol A of the transcriptionist looks very similar to a cursive F. (my mistake, again my apologies for sending you off in the wrong direction)
The F in Feby (February) and Fleming written on the card is distinctly different than the A in Aug. & Greenville, Ala.
This John Fleming was probably from South Alabama.
Barry