U.S. History is the story of how the United States was formed and developed over time. It began with the arrival of Native Americans, followed by European explorers like Christopher Columbus. In 1776, the thirteen colonies declared independence from Great Britain, leading to the American Revolution. This event marked the birth of the nation and the establishment of its foundational documents, such as the U.S. Constitution. As the country grew, it faced challenges like the Civil War, which was fought over issues like slavery and states' rights. The U.S. expanded westward, experienced industrialization, and became a global power. Key figures like Abraham Lincoln and movements for civil rights shaped the nation into what it is today.