美国取得独立之时,其领土只限于大西洋沿岸至密西西比河以东地区(佛罗里达不在内)。独立后政权由北方资产阶级和南方种植园奴隶主联合统治,他们都热衷于扩张领土。新政府废除了英国向西部移民的禁令,许多来自东部沿海地区和欧洲的移民纷纷越过阿巴拉契亚山脉涌向西部,形成了美国历史上著名的“西进运动”。路易斯安娜地处密西西比河流域,早在17世纪初,由法国殖民者开拓建立起来,自北至南纵贯北美大陆中部,面积达200多万 When the United States gained independence, its territory was limited to the Atlantic coast to the east of the Mississippi River (Florida is not included). After the independence, the regime was jointly ruled by the northern bourgeoisie and the southern plantation slave owners who were all keen to expand their territories. The new government abolished the British ban on immigrants to the west. Many immigrants from the eastern coastal areas and Europe flocked across the Appalachian Mountains to the west, forming the famous “Westward Movement” in American history. Louisiana is located in the Mississippi Valley. As early as the 17th century, it was built by French colonists. It runs from north to south through the central part of the North American continent and covers an area of ​​more than 2 million.