1. The American Revolution Battle of Camden took place on September 15, 1780, near present-day Camden, South Carolina. This battle was a significant win for the British forces, led by General Charles Cornwallis, and a loss for the Americans, led by General Horatio Gates.

2. On September 15, 1830, the first passenger train traveled from Charleston to Hamburg, South Carolina. This train ride was a milestone for transportation in the state and helped to connect different areas of South Carolina.

3. The South Carolina State Fair, one of the largest agricultural fairs in the United States, begins in mid-September each year. The fair historically takes place in Columbia, the state capital, and has been held each year since 1869. September 15 often falls within the fair's dates.

4. Hurricane Hugo, one of the strongest hurricanes to hit the United States, made landfall in South Carolina on September 15, 1989. The hurricane caused significant damage to coastal areas and resulted in 35 deaths in South Carolina alone.

5. On September 15, 2004, Hurricane Ivan caused significant flooding and damage in the state of South Carolina. The storm led to nine deaths, over $1 billion in damage, and was one of the costliest disasters in the state's history.