Briefly describe the development of American history.

The development of American history is as follows:

1789 became a unified federation after independence from British rule in 776. After more than 200 years of development, the economic, political and military strength of the United States has surpassed that of its former sovereign state and any other country. After the disintegration of the Soviet Union, the United States became the only superpower in the world.

1776 The American War of Independence declared independence from Britain. 1789 After the promulgation of the American Constitution, the United States became a federal republic and the first modern democratic country in the world. From the19th century, the United States began to develop from the original 13 states in the eastern part of the North American continent to the central and western regions, and the area of the United States increased day by day. At the same time, the United States also has many territories overseas. The two major events in American history are the Civil War (186 1 ~ 1865) and the Great Depression (1930).

North American aborigines came to North America from about 9000 BC to 48000 BC and took control of this area until the European colonists came here in the early17th century.

From 1493 to 1779, there was a long war between American colonies and North American aborigines. The serious shortage of labor has produced slaves, indentured slaves and other non-free labor, while the laissez-faire policy of the British government has enabled the unique American spirit and culture to develop its uniqueness.

During the period of 1776- 1789, the United States won the American War of Independence and established the United States of America with thirteen North American states.

1805 When the French navy was destroyed in the Battle of Trafalgar, on the one hand, Britain wanted to cut off France's overseas trade ties, and on the other hand, in retaliation for American trade behavior, Britain imposed a blockade on the American coast.

/kloc-At the beginning of the 0/9th century, the United States began to industrialize and entered a mature stage after the Civil War. ?

After the first world war, the United States declared neutrality, provided arms to the warring parties, and soon provided loans to its allies. 19 16, Wilson was re-elected. 19 17, the United States declared war on Germany after a German submarine sank an American ship on April 6. During the war, due to the interruption of foreign immigrants, a large number of blacks moved northward.

After World War II, with the defeat of the Axis countries and the decline of the strength of Britain and France, the United States and the Soviet Union became superpowers, and the world was divided into two camps. The United States and the Soviet Union and their respective camps stepped up preparations in military, political, economic, propaganda and other aspects.

In 1990s, American computer industry developed rapidly, which promoted the global high-tech information industry and started a new generation of industrial revolution. In the late 1990s, under the leadership of the United States, NATO expanded eastward. 1999 In early 1999, the United States led NATO to launch air strikes against Yugoslavia.