American Civil War course of four years. Intense combat left 620,000 to 750,000 people dead, more than the number of U.S. military deaths in all other wars combined. The war ended when General Robert E. Lee surrendered to General Ulysses S. Grant at the Battle of Appomattox Court House. Confederate generals throughout the southern states followed suit. Much of the South's infrastructure was destroyed, especially the transportation systems. The Confederacy collapsed, slavery was abolished, and four million black slaves were freed. During the Reconstruction Era that followed the war, national unity was slowly restored, the national government expanded its power, and civil rights
Birthright citizenship in the United States the fundamental legal principle governing citizenship has been that birth within the United States grants U.S. citizenship; although enslaved persons and children of enslaved mothers, under the principle of "partus sequitur ventrem", were excluded. The United States did not grant citizenship after the American Civil War to all former slaves until the passage of the Civil Rights Act of 1866, which was subsequently confirmed by the Fourteenth Amendment. American Indian tribal members are not covered specifically by the constitutional guarantee. Those living in tribes on reservations were generally not considered citizens until passage of the Indian Citizenship Act of 1924,