Arkansas, North Carolina, Tennessee, and Virginia did not secede until after Lincoln announced the invasion to subdue the Confederacy and ordered them to provide troops.
Arkansas' ordinance of secession is quite clear that the reason it left were Lincoln's illegal actions of invading sovereign states. Arkansas had already had a secession convention and decided to stay in the Union deciding that slavery and the other issues were not enough reason to leave.
Last edited by JoeBob; 06/28/15.
