What is the development history of the United States?

1, 1760s, 1770s, 13 The tension between the North American colonies and Britain led to a series of armed conflicts in 1774, 1775.

On July 4th, 1976, 13 colonial representatives attending the Second Continental Congress signed the American Declaration of Independence, which turned the armed conflict into a war of independence. At the meeting, the delegates decided to build a continental army led by George Washington to fight against the British.

178 1 year, 13 constituent states all passed the Confederacy Regulations, and the permanent confederation was established.

2. From the19th century, the theory of "destiny" began to appear in the United States, and the theory of "destiny" became the political slogan of the United States in the19th century. One of the meanings is that Americans are "chosen by heaven" and must expand their territory and power. Under the leadership of American expansionism, the westward movement of the United States rose and began to expand to the west.

1860 * * * and the party's abraham lincoln were elected president, and the conflict broke out completely because Lincoln's * * and the party opposed the expansion of slavery.

South Carolina became the first state to declare secession, and six southern States also seceded from the Union. 186 1 year, the United States of America was founded and opposed to the federal government.

Shortly after Lincoln took office, the civil war broke out, and the American Civil War ended with the victory of 1865 Federation, which also ended the debate on slavery and whether States had the right to secede from the Federation. This civil war became an important watershed in American history. Since then, the power of the federal government has greatly increased, and the position of the * * * and the party in controlling American politics has been established until 1933.

3. 19 14 World War I broke out, and the United States initially remained neutral; The unrestricted submarine war launched by Germany sank an American ship (RMS Lusitania) sailing in the Atlantic Ocean, causing many innocent casualties among American civilians and angering the American people. In the last stage of the war, the United States joined the Allies in 19 17 to fight against the Allies.

1941after Japan attacked pearl harbor on February 7, the United States joined the anti-fascist alliance against the axis powers. The next battle became the most expensive war in American history. However, a large number of job opportunities created by the front and back, as well as the production recovery driven by the military industry, have completely pulled the American economy out of the haze of panic. As a result, American women entered the workplace on a large scale.

After the victory of the war, the contradiction between the United States and the Soviet Union gradually emerged. Politically, the United States represents the market economy model of capitalist policy and liberal democracy system, while the Soviet Union represents the planned economy model of socialist policy and one-party dictatorship system. The rise of the Soviet Union and the ideological conflict caused the Cold War that began in the late1968+0940s.

/kloc-in the 1990s, thanks to a large number of employment opportunities and technological changes brought about by the digital revolution and the Internet, the American economy experienced unprecedented prosperity and growth, and the emerging Silicon Valley became a major town in the world information industry, and a large number of information industry companies such as Apple and Google were born.

4. Since the end of 2008, the American economy has fallen into the subprime mortgage crisis, which was once hit hard. Now it has entered the recovery period, and the unemployment rate began to decline from the peak of 10%. However, the whole subprime mortgage crisis did not shake the status of the United States as a world power.

On June 20, 2009, Barack Hussein Obama, the first African-American president in American history, was sworn in and left office on June 201July.

2017 65438+1On October 20th, President Donald Trump was sworn in.

202165438+1On October 20th, Joe Biden, the oldest president in American history, was sworn in.

Extended data:

As a highly developed country, the United States is the largest importer and the second largest commodity exporter in the world. In terms of international exchange rate, its GDP ranks first in the world and second in terms of purchasing power. The United States leads the world in social and economic performance indicators such as national average wage, human development index, per capita GDP and per capita productivity.

The American economy has entered the post-industrial era, and the service industry occupies a dominant position in the economy, ranking first in the world. At the same time, its manufacturing scale is also extremely large, ranking second in the world. The United States is an important and far-reaching force in the world's politics and culture, and also occupies a leading position in scientific research and technological innovation.