Contents 1 Etymology 2 History 2.1 Indigenous peoples and pre-Columbian history 2.2 Effects on and interaction with native populations 2.3 European settlements 2.4 Independence and expansion (1776–1865) 2.5 Civil War and Reconstruction era 2.6 Further immigration, expansion, and industrialization 2.7 World War I, Great Depression, and World War II 2.8 Cold War and civil rights era …