How did the northerners and Southerns view the secession of the south States?

Northerners generally viewed the secession of Southern states as a rebellion against the Union, seeing it as a threat to the nation's integrity and a challenge to federal authority. Many believed it was driven primarily by the desire to protect and perpetuate slavery. In contrast, Southerners typically saw secession as a legitimate response to perceived oppression and a means to preserve their way of life and rights, including the institution of slavery. This fundamental divide fueled tensions that ultimately led to the Civil War.