Greeneville, Tennessee in the context of Greene County, Tennessee

Andrew Johnson (December 29, 1808 – July 31, 1875) was the 17th president of the United States, serving from 1865 to 1869. The 16th vice president, he assumed the presidency following the assassination of Abraham Lincoln. Johnson was a War Democrat who ran with Lincoln on the National Union Party ticket in the 1864 presidential election, coming to office as the American Civil War concluded. Johnson favored quick restoration of the seceded states to the Union without protection for the newly freed people who were formerly enslaved, as well as pardoning ex-Confederates. This led to conflict with the Republican Party-dominated U.S. Congress, culminating in his impeachment by the House of Representatives in 1868. He was acquitted in the Senate by one vote.

Johnson was born into poverty and never attended school. He was apprenticed as a tailor and worked in several frontier towns before settling in Greeneville, Tennessee, serving as an alderman and mayor before being elected to the Tennessee House of Representatives in 1835. After briefly serving in the Tennessee Senate, Johnson was elected to the U.S. House of Representatives in 1843, where he served five two-year terms. He was the governor of Tennessee for four years, and was elected by the legislature to the U.S. Senate in 1857. During his congressional service, he sought passage of the Homestead Bill, which was enacted soon after he left his Senate seat in 1862. Slave states in the Southern U.S., including Tennessee, seceded to form the Confederate States of America, but Johnson remained firmly with the Union. He was the only sitting senator from a Confederate state who did not promptly resign his seat upon learning of his state's secession. In 1862, Lincoln appointed him as Military Governor of Tennessee after most of it had been retaken. Johnson was a logical choice as Lincoln's running mate in 1864 because Lincoln wanted to send a message of national unity in his re-election campaign. Following their victory, Johnson became vice president.