 At Johnson's request, the East Tennessee Convention reassembled at the Knox County Courthouse in Knoxville on April 12, 1864 (the date was chosen as the third anniversary of the attack on Fort Sumter).The purpose of this session was to discuss Lincoln's ten percent plan, which allowed any former Confederate state to reenter the Union if ten percent of its prewar voting population took the Oath of Allegiance and pledged to support emancipation.Just 160 delegates from 23 counties attended, substantially fewer than the first two sessions.