When was the United States founded! !

The founding year of the United States: 1776 The United States was the earliest place where Indians lived. /kloc-At the end of 0/5, European countries began to immigrate to North America. In the first half of 17- 18 century, Britain established 13 colonies between the Atlantic coast and the Appalachian mountains. 1775 The War of Independence broke out. 1776, the Declaration of Independence was issued and the United States of America was proclaimed. 1783 The war ended and Britain recognized 13 colonial independence. 1787 to formulate a federal constitution and establish a federal republic. After independence, capitalism in the north developed rapidly, while the south was still an agricultural economy using slave labor. A civil war broke out between 1862- 1865, and the north won. Since then, capitalism has developed rapidly in America. The United States bought Louisiana from France in 1803. 18 12 expanded westward and further occupied Indian land. 18 18 bought some land in north Dakota from Britain. 18 19 bought Florida from Spain. 1845 occupied Texas, Mexico. 1848 After the war against Mexico ended, New Mexico, Arizona, California, Nevada, Utah, Colorado and other places were obtained. /kloc-in the middle and late 20th century, it expanded overseas. 1867 Alaska and Aleutian Islands were purchased from Russia. 1876 occupied midway island. 1898, through the war against Spain, it seized Puerto Rico, Guam and the Philippines and annexed Hawaii. 19 17 forced Denmark to "sell" the Virgin Islands. 1959 Alaska and Hawaii became two states in the United States. During the 100 years after 176, the territory expanded by 10 times.