eng ----By Peng Yuanyuan Yuanyuan Introduction Process Concrete events Conclusion Introduction In 1783, the Britain recognized the independence of the United States and America acquired 13 states as well as the east coast of the Atlantic. At that time the territory of America had grown to 2,300,000 ㎞2 . It was roughly equivalent to 30% of the current land of America. Process In 1789, the US federal government had been established and soon led the country to the way of territory expansion. The most commonly used tactics: purchase, occupation, invasion In 1789, the US federal government had been established and soon led the country to the way of territory expansion. The most commonly used tactics: purchase, occupation, invasion