The official name is the Federal Republic of America, North America.

It includes 48 contiguous states occupying the central part of the continent, Alaska at the northwest end of North America, and Hawaii, an island country in the central Pacific Ocean. The United States is a Republic with two houses; Its head of state and government is the president. This land was originally inhabited by many American Indians who may have immigrated from Asia for thousands of years. The exploration and settlement of Europeans began in the 6th century A.D./KLOC-and Indians began to be displaced. The Spanish established the first permanent European settlement in St. Augustine, Florida in 1565; The British settled in Jamestown, Virginia (1607); Plymouth, Massachusetts. ( 1620); Maryland (1634); And Pennsylvania (168 1). 1664, one year after being granted a British peerage in Carolina, the British seized new york, New Jersey and Delaware from the Dutch. Britain defeated France in 1763 (see the war between France and India), ensuring British political control over its 13 colony. The political turmoil caused by British colonial policy reached its climax in the American Revolution (1775–83) and the Declaration of Independence (1776). The United States was originally established according to the federal clause (178 1), and finally the federal republic was established according to the Constitution (1787). The border extends westward to the Mississippi River, excluding Florida, Spain. The Louisiana Purchase (1803) obtained the land from France, which almost doubled the territory of the country. The United States fought a war with the British for 18 12 years, and acquired Florida from Spain in 18654 38+09. In 1830, it legalized the migration of American Indians to the land west of the Mississippi River. In the middle of19th century, especially after the discovery of gold in California in 1848, the settlements spread to the far west. The victory of the Mexican War (1846–48) made seven other future states (including California and Texas) fall into the hands of the United States. The northwest boundary was determined by a treaty with Britain in 1846. The United States acquired southern Arizona through Gadsd en Purchase (1853). In the conflict between the plantation economy based on slavery in the south and the free industrial and agricultural economy in the north, it suffered division, which eventually led to the American Civil War and the abolition of slavery according to the amendment 13. After reconstruction (1865–77), the United States experienced rapid growth, urbanization, industrial development and European immigration. 1877, which authorized the distribution of American Indian reservations to various tribes, resulting in a large amount of land lost to white people. By the end of19th century, it had developed foreign trade and acquired peripheral territories, including Alaska, Midway Island, Hawaiian Islands, Philippines, Puerto Rico, Guam, wake island, American Samoa, Panama District and Virgin Islands. The United States participated in World War I1917–18. It gave women the right to vote in 1920 and American Indians the right to citizenship in 1924. The stock market crash of 1929 led to the Great Depression. After Japan attacked Pearl Harbor, the United States joined the Second World War. The United States exploded an atomic bomb in Hiroshima (August 6, 1945) and Nagasaki (August 9, 1945), respectively, which led to Japan's surrender. Since then, the United States has become a military and economic leader in the western world.

American history cannot be finished in a few words. It's a condensed version, because I study history, and I may think everything is important.