(1) Overview: ① 1775 ~ 1783 War of Independence, American independence. ② The Declaration of Independence was issued in 1776. ③ 1787 Constitution established the federal system of * * * and separation of powers. (4)1861~1865 civil war, 1862 promulgated the homestead act and the emancipation proclamation. ⑤/kloc-from the beginning of the 9th century to the end of the 9th century, * * * and the Party and the Democratic Party took turns to govern. After the transition to imperialism, the differences between the two parties disappeared. All landowners1933 Roosevelt's New Deal. ⑧ 1946 introduced Truman Doctrine and implemented the "Cold War". Pet-name ruby after world war ii, become the world political hegemon.

(2) Features: ① High degree of political democratization. (2) occupying world political hegemony for a long time.

North America was originally inhabited by Indians. /kloc-At the end of 0/5, Spain, the Netherlands, France, Britain and other countries began to immigrate to North America. 1606, Britain established its first city in North America-James, which later developed into a Virginia colony. 13 colonies were successively established by British colonists from the Atlantic coast in the east to the Appalachian mountains in the west in the 7th century and the first half of the 8th century. They brutally slaughtered local Indians and plundered a large number of blacks from Africa as slaves. 1775, the people's armed uprising in Boston started the first shot of the American people's war of independence against British colonial rule. The second continental congress was held in Philadelphia on 1776. Decided to form a continental army with G Washington as its commander in chief, and adopted the Declaration of Independence to formally declare the establishment of the United States of America. 1783 When the American War of Independence ended, Britain was forced to recognize American independence. 1787 adopted the federal constitution, held the first election at the end of next year, and Washington was elected as the first president. The federal government was established in 1789. 1812 ~1814 After the Second American-British War, the United States completely got rid of British rule. Since then, capitalism in the northern part of the United States has developed rapidly, but the southern part still maintains an agricultural economy that uses slave labor. The 65438+ American abolitionist movement rose in the early 1930s. 1860 * * and anti-slavery Republican A. Lincoln were elected president. The following year, the slave owners in the south launched a rebellion and the civil war broke out. 1In September, 862, Lincoln released The Emancipation Proclamation. 1865 the war ended in the victory in the north, clearing the way for the capitalist development of the whole United States.

/kloc-At the beginning of the 9th century, with the rapid development of capitalism, the American ruling class began to expand abroad. 1803, the United States took advantage of Napoleon's defeat in Haiti to buy the French colony Louisiana in North America. 18 12 The United States expanded westward and occupied Indian land. In 18 18 and 18 19, the United States purchased some land in North Dakota and Florida from Britain and Spain respectively. 1845 occupied Texas, Mexico. The following year, the United States declared war on Mexico under the pretext of the border incident, and Mexico was forced to "sell" 2.3 million square kilometers of land in the north (namely, California, Arizona, Nevada, Utah, New Mexico, Colorado and other States) to the United States with 1848. /kloc-In the middle and late 20th century, the United States expanded and invaded overseas. 1867, the United States bought Alaska and Aleutian Islands from Russia for $7.2 million. 1898 annexed Hawaii, controlled Cuba through the war against Spain, and seized Puerto Rico, Guam and the Philippines. 1903 occupy midway island and occupy Panama canal. 19 17 forced Denmark to "sell" the Virgin Islands. In the 100 years after 1776, the territory of the United States almost expanded by 10 times. With the development of capitalism, the power of the American proletariat has gradually grown. J Weidemai, a comrade-in-arms of Marx and Engels, founded the first Marxist group-Proletarian League in the United States on 1852. 1858, the national capitalist club joined the first international. 1869, American workers established the first national organization-the Knights of Labor. May 1886 Chicago workers' strike struggle and March 8 1909 Chicago women workers' strike demonstration made these two days May 1 International Labor Day and March 8 International Women's Day.

/kloc-from the end of 0/9 to the beginning of the 20th century, the United States entered the stage of imperialism. At the beginning of World War I, the United States declared "neutrality" and later declared war on Germany. After the war, he participated in the Paris Peace Conference where imperialism re-divided the world. From 65438 to 0929, an unprecedented economic crisis broke out in the United States. 1933, F. Roosevelt took office as president and proposed a "new deal" to get rid of the economic crisis. During World War II, the United States was "neutral" first and then entered the war. The monopoly bourgeoisie took the opportunity to make a fortune in the war, and the American economy and military power developed rapidly, and rose to become the overlord of the capitalist world after the war. The invasion of Korea in the early 1950s and zhina in the 1960s seriously weakened the strength of the United States, which experienced the worst economic crisis after the war at 1973 ~ 1975. Reagan became president of the United States on 198 1.

1988165438+1October * * * and Republican George W. Bush were elected president of the United States. During the Bush administration, the United States experienced the longest recession and the weakest recovery after the war. 1992165438+10 In October, Democratic presidential candidate W.J. Clinton was elected as the 42nd president of the United States. 1996165438+10, Clinton ran for re-election. In 2000, * * * and Republican George W. Bush were elected as the new president. During their term of office, the United States suffered the worst terrorist attack in history "9.11"; George W. Bush launched the so-called "anti-terrorism" wars in Afghanistan and Iraq during his tenure. George W. Bush was re-elected in 2004.

The current president is barack obama, the first black president in American history.