It is not definitively known how or when Native Americans first settled the Americas and the present-day United States. The prevailing theory proposes that people from Eurasia followed game across Beringia, a 查看更多內容

An upper-class emerged in South Carolina and Virginia, with wealth based on large plantations operated by slave labor. A unique class system operated in upstate New York, where Dutch tenant farmers rented land from very wealthy Dutch proprietors, … 查看更多內容

Confederation and constitution
In the 1780s the national government was able to settle the issue of the western regions of the … 查看更多內容

Divisions between North and South
The central issue after 1848 was the expansion of slavery, with the anti-slavery elements in the North pitted against the pro-slavery elements that dominated the South. A small number of active Northerners were 查看更多內容

After a period of exploration sponsored by major European states, the first successful English settlement was established in 1607. Europeans brought horses, cattle, and hogs to the Americas and, in turn, took back maize, turkeys, tomatoes, potatoes, … 查看更多內容

The American Revolutionary War began at Lexington and Concord in Massachusetts in April 1775 when the British tried to seize ammunition … 查看更多內容

Indian removal
In 1830, Congress passed the Indian Removal Act, which authorized the president to negotiate treaties that exchanged Native American tribal lands in the eastern states for lands west of the Mississippi … 查看更多內容