I agree with you. I found this on the internet.
Tennessee conflicts ran strong. While their neighbors and sometimes brothers fought for the South, some 31,000 Tennesseans joined the Federal army. Tennessee sent more white soldiers to fight for the Union than any other Southern state. Most were from East Tennessee, Astor said.
Greeneville resident Andrew Johnson was the only U.S. senator from the South to remain loyal to the Union after his state seceded. That loyalty was rewarded — President Abraham Lincoln named Johnson Tennessee’s military governor in 1862 and his vice-presidential running mate in 1864.
from
https://www.knoxnews.com/story/news/2017/08/26/east-tennessee-civil-war-pro-union-divided/599123001/