Well, there were multiple events, but one of the most significant events that caused the succession was the election of Abraham Lincoln (1860), but the war didn't actually begin until the Confederacy bombarded Fort Sumter.
slavery
The event that determined the status of slavery during the 1850s was the Wilmot Proviso. It was also a major cause of the Civil War.
The secession of South Carolina from the Union
the Civil War
the Civil War
slavery
The election of Lincoln as president.
The Civil War
The event that determined the status of slavery during the 1850s was the Wilmot Proviso. It was also a major cause of the Civil War.
The secession of South Carolina from the Union
the Civil War
the Civil War
The election of Abraham Lincoln in November 1860.
Abraham licon wanting to stop slavery
He had been arrested for protesting war and slavery.
the reconstruction era of the United States
The event that triggered the fighting between the north and south was when Jefferson Davis ordered that Fort Sumpter be attacked. This started the American Civil War. States rights and slavery were also trigger points.