why do think the vote at the south convention of 1860 was unanimous
Yes. The South Carolina legislature remained in session until the results came in. Then it announced a forthcoming Convention that gave a unanimous vote to secession (Dec. 20th 1860). Six more states seceded in the next few weeks.
As a consequence of Lincoln’s election, a special convention of the South Carolina legislature votes to secede from the Union.
When President Lincoln was elected president in 1860, much of the south reacted. Even before Lincoln took office, South Carolina called a convention in the south and delegates voted to secede, thus spurring the Civil War that would follow.
Only one state seceded in 1860, South Carolina.
1860, December of 1860
South Carolina
i dont know joking NEW RESPONDENT South Carolina on Dec. 20, 1860
South Carolina became the first Southern state to declare its secession ; December 20, 1860 .
1860
South Carolina
December 20th 1860