I want to know the contents of the westward movement in the United States

The westward movement is the process of American development and migration from the east to the west of North America. It began after the founding of the United States, when immigrants crossed the Appalachian Mountains and entered the east of the Mississippi River. From the 1920s of 19, immigrants began to cross the Mississippi River and enter the newly expanded areas of the United States. In the 1940s, gold mines were discovered in California, which formed the "California fever" of immigrants. /kloc-at the end of 0/9, the westward movement ended.

After the independence of the United States, the British government's decree prohibiting immigrants from moving westward was abolished, and many immigrants from the eastern coastal areas and Europe crossed the Appalachian mountains and flocked to the west. According to statistics, the population west of Appalachia accounted for only 1/7 of the total population of the United States in 18 10, and increased to 1/4 after 10. Among these immigrants, there are both slave owners in the south and land speculators in the north; However, the largest number of poor pioneers-hunters, miners, herders and farmers-came to the west to make a living and became the main body of early immigrants in the west. The westward movement has three climaxes. The first time was from the end of 18 to the beginning of 19. At that time, the United States bought Louisiana from France, and a large number of immigrants flocked to the west to open up Ohio, Kentucky and Tennessee, laying the foundation for the growing grain-producing areas in the central and western regions. The second time is after 18 15. Later, the immigrants opened up in the Great Lakes region, established the bases of grain production and animal husbandry in the United States, and established cotton plantations in the plain area between southern Georgia and Louisiana near the Gulf of Mexico in the south, expanding the slave plantation economy in the south. The third climax was in the middle of19th century, which opened Oregon and California. By 1890, the westward movement officially ended. The westward movement and territorial expansion are intertwined. In the westward movement, the western region was developed, which greatly promoted the economic development of the United States. However, with the westward movement, a large number of Indians were slaughtered, and the survivors were forcibly driven to a more desolate "reservation". Their forced migration road is also known as the "tears road" of Indians.

From the North American War of Independence to the 1980s of 19, the movement of emigrating to the western part of the North American continent and plundering Indian land was also the process of the large-scale development of American capitalism. In this movement, it is full of the fact that the American ruling class slaughtered Indians, and it also left behind the fruits of immigrants' hard struggle to develop the western region.

After the civil war, a large number of cattle herders transformed the barren plain into a huge pasture in more than 20 years. Due to the development of industrial technology, with the help of steel plows, barbed wire and agricultural machinery, small farmers have turned barren grasslands into fertile fields. 1890, the westward movement officially ended.

The westward movement in American history refers to the mass movement in which residents from the eastern United States moved to the western region and developed. Its essence is the expansion of capitalist mode of production, which began at the end of 18 and ended at the end of 19 and the beginning of the 20th century.

Baidu Encyclopedia has a more detailed introduction:

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