USA, History

Story of how the republic developed from colonial beginnings in the 16th century, when the first European explorers arrived, until modern times. As the nation developed, it expanded westward from small settlements along the Atlantic Coast, eventually including all the territory between the Atlantic and Pacific oceans across the middle of the North American continent, as well as two noncontiguous states and a number of territories. At the same time, the population and the economy of the United States grew and changed dramatically. The population diversified as immigrants arrived from all countries of the world. From its beginnings as a remote English colony, the United States has developed the largest economy in the world. Throughout its history, the United States has faced struggles, both within the country—between various ethnic, religious, political, and economic groups—and with other nations. The efforts to deal with and resolve these struggles have shaped the United States of America into the 21st century.