What did the south confederacy believe they had to do to win the war?

To win the war, the South had only to survive. On the other hand, for the North to win, the Union had to be restored. Thus, Union forces had to conquer the South in order to win the war.

i believe we're not a republic so that is a hard question

sir thomas more, venerated in the catholic church as saint thomas more, was an english lawyer, social philosopher, author, statesman, and noted renaissance humanist. he was also a councillor to henry viii, and lord high chancellor of england from october 1529 to 16 may 1532.