The affix ante- means "before" based on this knowledge and the meaning of belli when was the antebellum period in american history?

The antebellum period in American history refers to the time before the American Civil War, which lasted from 1861 to 1865. Specifically, the antebellum period is often defined as the decades leading up to the war, generally considered to be from the early 1800s until the onset of the Civil War in 1861. This era was marked by significant economic, social, and political changes, including the rise of abolitionism and tensions over slavery.