These debates transformed into a national crisis when South Carolina threatened secession, an explicit threat of Thirty years before the Civil War broke out, disunion appeared to be on the horizon with the Nullification Crisis. nullification crisis foreshadowed the secession crisis of the early 1860s, and despite being thirty years apart, the two events share several themes. In both cases, radical fire-eaters in South Carolina threatened secession and declared their state’s sovereignty, national

The Nullification Crisis. The Nullification Crisis was geographically important because it was centered around the South. Because the Tariff of Abominations hurt the southern economy, sectional tensions escalated. Southerners such as John C. Calhoun began to rally around the idea of nullification in order to have their voice heard.