What is the origin and history of America?

The origin and history of the United States is that the original inhabitants of North America are Indians. 16-18th century, the western European countries that were conducting primitive accumulation of capital invaded North America one after another.

The United States was the first place where Indians lived. At the end of 15, Spain, the Netherlands, France and Britain immigrated here one after another. 13 Before the 8th century, Britain established13 British North American colony on the Atlantic coast of the United States. 1775, the American people broke out the war of independence against the colonial rule of the British Empire.

1776 On July 4th, the Second Continental Congress was held in Philadelphia. George Washington was the commander-in-chief of the Continental Army and issued the Declaration of Independence, announcing the formal establishment of the United States of America. 1783 At the end of the War of Independence, Britain recognized the independence of 13 colonies. 1787, the constitution of the United States was passed, and a federal state was established.

Climatic characteristics:

Most parts of the United States have a continental climate, while the south has a subtropical climate. The temperature difference between the central and northern plains is very large. The average temperature in Chicago is MINUS 3 degrees in June and 24 degrees in July. 65438+ 10, the average temperature along the coast of the Gulf of Mexico is 1 1℃, and it is 28℃ in July.