Sorry,
@WJC , and
@Vicksburger , but that's exactly what each and every Confederate soldier was fighting for, whether he wanted to or not.
Just like every Union soldier was fighting for Emancipation whether he wanted to or not.
Just as no mechanic ever asks his tools if it's OK to work on a particular machine, no government, Confederate or US ever says to it's soldiers, "Pretty please, fight for something you're not personally for." The soldier is a tool in the nation's toolbox, a hammar when nothing else (compromise, diplomacy, etc.) will accomplish that government's political goals.
Oh, the soldier may be fighting for home, family, religion, or adventure and money, but his government does not concern itself with those personal motivations when it is fighting to preserve and protect slavery or to preserve the Union.
He goes where he is told and fights who he is pointed at. He may believe what he wishes, but he fights all the same for his nation's goals.
Unionblue