<span>i'm not sure if this is what you're looking for but <span>biological anthropology, cultural anthropology, linguistic anthropology, and archaeology are the four major fields of anthropology </span></span>
Well the South remember seceded completely, meaning they weren't part of the United States at all. Reconstruction allowed them back in, along with help from the 10% plan. The plan allowed the states and their governments back in as long as 10% of the population swore allegiance to the Union.