South Carolina covers 31,113 sq mi and is an original state of the Union; its capital is Columbia. The state comprises a broad coastal plain with a rolling piedmont farther inland. At the time of European contact the area was inhabited by Sioux, Iroquois, and Muskogean Indians. Spanish and French settlements were established and abandoned in the 16th century; the first permanent European settlement was made by the English in 1670 at Charles Town, moved to the present site of Charleston in 1680. Several military campaigns were fought in South Carolina during the American Revolution. In 1788 South Carolina became the eighth state to ratify the U.S. Constitution, and in 1860 it became the first state to secede from the Union. The initial action of the American Civil War occurred there at Fort Sumter. It was readmitted to the Union in 1868. Constitutional revisions in 1895 disenfranchised almost all of the state's blacks, and a rigid policy of racial segregation persisted until the mid-1960s, when the national civil rights movement began to have some effect in ameliorating racist policies. South Carolina is a leader in U.S. textile manufacturing and has a large industrial base. Tourism is its second largest industry. Agriculture also contributes to the economy; major crops include tobacco, soybeans, and cotton.