what they LATER wrote is called RE-writing history & spouting SELF-serving, sanctimonious, LIES to cover-up the FACT that the war against the new dixie republic was BOTH needLESS & UNjust!
the TRUTH is that a MILLION BRAVE "Billy Yanks", "Johnny Rebs" & INNOCENT civilians (both slave & free) died for little more than political POWER & $$$$$.
free dixie,sw
Or it could be that when they had time to reflect on what happened, they came to the conclusion that the cause of the war was slavery, just as almost everybody else has since then.
Do you have some evidence that they thought differently on matters earlier?