Can anyone summarize the development history of the United States for me, starting from before the Civil War? Be more detailed!

United States (1) Overview: ①The War of Independence from 1775 to 1783, the independence of the United States. ②The Declaration of Independence was issued in 1776. ③The 1787 Constitution established a federal government system with separation of powers. ④The Civil War from 1861 to 1865, and the Homestead Act and the Emancipation Proclamation were promulgated in 1862. ⑤ From the beginning of the 19th century to the end of the 19th century, the Communist Party and the Democratic Party took turns in power. ⑥After the transition to imperialism is completed, the differences between the two parties disappear. ⑦Roosevelt’s New Deal in 1933. ⑧In 1946, the Truman Doctrine was introduced and the "Cold War" was implemented. ⑨After World War II, it became the world’s political hegemon. (2) Characteristics: ① The degree of political democratization is relatively high. ② Occupy the dominant position in world politics for a long time.

North America was originally an Indian settlement. At the end of the 15th century, Spain, the Netherlands, France, Britain and other countries began to immigrate to North America. In 1606, the British built the first city in North America, James, which later developed into the Virginia Colony. In the 17th century and the first half of the 18th century, British colonists established 13 colonies from the Atlantic coast in the east to the Appalachian Mountains in the west. They brutally massacred local Indians and plundered large numbers of black people from Africa to serve as slaves. . In 1775, the Boston people's armed uprising fired the first shot of the North American people's war of independence against British colonial rule. In 1776, the Second Continental Congress was held in Philadelphia. The meeting decided to form the Continental Army, with G. Washington as commander-in-chief, and adopted the Declaration of Independence, officially declaring the establishment of the United States of America. The American Revolutionary War ended in 1783, and Britain was forced to recognize American independence. The federal constitution was adopted in 1787, and the first election was held at the end of the next year, with Washington elected as the first president. The federal government was established in 1789. After the second American-British War from 1812 to 1814, the United States completely got rid of British rule. Since then, capitalism in the northern United States has developed rapidly, but the south still maintained an agricultural economy using black slave labor. The abolition movement emerged in the United States in the early 1830s. In 1860, A. Lincoln, a Republican who opposed the black slavery system, was elected president. The following year, southern slave owners launched a rebellion and the Civil War broke out. In September 1862, Lincoln issued the Emancipation Proclamation. The War of 1865 ended with a Northern victory, clearing the way for the growth of capitalism throughout the United States.

In the early 19th century, with the rapid development of capitalism, the American ruling class began to expand abroad. In 1803, the United States took advantage of Napoleon's defeat in Haiti and purchased the French colony of Louisiana in North America. In 1812 the United States expanded westward and invaded Indian lands. In 1818 and 1819, the United States purchased portions of North Dakota and Florida from Britain and Spain, respectively. In 1845, it invaded Texas, Mexico. The next year, the United States declared war on Mexico under the pretext of border incidents. Mexico was forced to "sell" 2.3 million square kilometers of its northern land (today's California, Arizona, Nevada, Utah, New Mexico, Colorado and other states) to the United States in 1848. . In the mid-to-late 19th century, the United States extended its aggression and expansion overseas. In 1867, the United States purchased Alaska and the Aleutian Islands from Tsarist Russia for $7.2 million. In 1898, it annexed Hawaii, controlled Cuba through the war with Spain, and seized Spanish Puerto Rico, Guam, and the Philippines. In 1903, it occupied Midway Island and occupied the Panama Canal. In 1917, Denmark was forced to "cede" the Virgin Islands. In the more than 100 years after 1776, the territory of the United States expanded almost 10 times. With the development of capitalism, the power of the American proletariat has gradually grown. J. Wedemeyer, a comrade of Marx and Engels, founded the Proletarian League, the first Marxist group in the United States, in 1852. In 1858, the National Communist Club joined the First International. In 1869, American workers founded the first national organization, the Knights of Labor. The strike struggle of Chicago workers on May 1, 1886 and the strike demonstration of Chicago female workers on March 8, 1909 made these two days International Labor Day and International Women's Day.

From the late 19th century to the early 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, as a victorious country, it participated in the Paris Peace Conference where imperialism re-divided the world. In 1929, an unprecedentedly severe economic crisis broke out in the United States. In 1933, F. Roosevelt became president and proposed the "New Deal" to get out of the economic crisis. During the Second World War, the United States was still "neutral" first and then entered the war. The monopoly bourgeoisie took advantage of the opportunity to make huge fortunes from the war. The United States' economic and military power developed rapidly, and it rose to the hegemony of the capitalist world after the war. In the early 1950s, it launched a war of aggression against Korea and in the 1960s, it invaded Indochina, severely weakening the strength of the United States. From 1973 to 1975, the United States experienced the most serious economic crisis after the war. In 1981 Ronald Reagan became President of the United States.

In November 1988, Republican G. Bush was elected President of the United States.

During the Bush administration, the United States experienced the longest post-war economic recession with the weakest recovery. In November 1992, Democratic presidential candidate W.J. Clinton was elected as the 42nd President of the United States. In November 1996, Clinton ran for re-election. In 2000, Republican George W. Bush was elected as the new president. During his term of office, the United States suffered the worst terrorist attack in history, the "9.11" incident; during his term of office, Bush launched the so-called "anti-terrorism" war against Afghanistan and Iraq. Bush was re-elected in 2004.

The current president is the first black president in American history, Barack Obama