The South when Abraham Lincoln signed the Emancipation Proclamation.
You said the Republican party fought against slavery.. That is true, but the Republican party around that time period have more modern Democrat beliefs. They were northerners who believed in equal rights. And the Democratic party in the 1800s had view more similar to modern Republican beliefs. The party's beliefs flip flopped around late 1800s-early 1900s.. The conservative states were always advocating for slavery and oppression. They were also the last states to give women the right to vote.