Slavery is closely relating from the first half of the 19th century in the westward movement, territorial expansion, and the frontier. The nation increased by adding new territories excessively until it reached the Pacific Ocean in the 1840s. In the west, slavery carried for the economic and social processes. The westward expansion took slavery in Mississippi, Alabama, Louisiana, and Texas.
In the South, slave owners demanded slavery because, without it, there was no growth in the country. Slaves used as labour in the plantations and domestic work.
