The term prisoner-of-war as used on this card will give the wrong impression. It suggests that the soldier was captured in battle and sent to prison, and that's incorrect here. All soldiers under Gen. Kirby Smith's command had been surrendered on May 26, 1865. As a former Confederate soldier, Morris apparently went to Monroe and applied for a parole on his own.
Little has been written about Harrison's 3rd Louisiana Cavalry. Art Bergeron's Guide to Louisiana Confederate Military Units, 1861-1865, provides the best summary of this command. He writes, "The men saw very little combat except with small enemy raidng parties moving inland from Vidallia or Vicksburg, Mississippi. By mid-May, 1865, many of the men of this regiment had deserted and gone to their homes."
Morris was probably among the majority.