You might want to visit Knights of the Golden Circle. This was a frat/Masonic type org of Yankees devoted to proctect their family and business interests in the south. There is compelling evidence that the KOGC bank rolled the the likes of Jesse James and others to commit a post bellum crime wave across the south. Andrew Johnson reported to Lincoln that their were more loyal Unionists in ET than there were in Ill, Ind, and Oh, combined. So with aa wink & a nod Lincoln allowed Tennesseans to join the Union Army against the objecions of others, including Grant and Sherman.