Called the "Volunteer State," Tennessee became the 16th state of the Union on June 1, 1796. On June 8, 1861, it joined the Confederacy and became a major battleground for the Civil War, re-entering the Union after war's end. It was the first territory admitted as a state under the federal Constitution. Before statehood, it was known as the Territory South of the River Ohio. The name Tennessee is derived from the name of a Cherokee village, Tanasi. Today, the capital, Nashville, is known as a center for country music. Memphis, the largest city in the state, is the place where Elvis Presley first began his legendary musical career. The state flower of Tennessee is the iris.