<human>:  When did the Industrial Revolution start in the United States?
<bot>: The Industrial Revolution started in the 1820s, and lasted until the 1880s. The Industrial Revolution brought many changes to the United States. For example, cities grew and people moved from farms to cities. This caused a huge increase in population. Also, the United States became an economic powerhouse, with many new factories being built. These factories produced a lot of goods, like cotton, steel, and coal. The United States became a major world power during the Industrial Revolution.