What happened as the south continued to grow during the 1800-1850?

As the South continued to grow, their reliance on plantations continued to grow with it. The amount of cash crops that the South needed to maintain its economy could only be produced with an enormous labor force to work in the plantations. This meant that slavery became more important, and that the number of slaves continued to increase. It also meant that tensions with the North continued to grow.

2018 means 2018 ce or common era

there have been other eras too including bce, which included way more years.