1. The Battle of Camden, which took place on August 16, 1780, was a pivotal moment in the American Revolutionary War. However, on August 20, 1780, a group of Patriot soldiers led by Francis Marion (known as the "Swamp Fox") attacked and defeated a group of Loyalists at Britton's Neck, South Carolina, further weakening British control over the state.

2. On August 20, 1832, the Nullification Convention met in Columbia, South Carolina, to discuss the state's opposition to the Tariff of Abominations, which many South Carolinians believed unfairly favored northern states. The convention ultimately passed an ordinance declaring the tariffs null and void within the state, leading to a constitutional crisis and the threat of secession.

3. The South Carolina State Fair, one of the largest agricultural fairs in the Southeast, traditionally takes place in October. However, on August 20, 1869, the state held its first-ever State Agricultural and Mechanical Fair in Columbia, which showcased the best of South Carolina's agriculture, industry, and technology.

4. On August 20, 1920, South Carolina ratified the 19th Amendment to the US Constitution, which granted women the right to vote. However, it would take until 1969 for the state's first female mayor, Sarah B. Leverette of Camden, to be elected.

5. On August 20, 2017, a total solar eclipse passed over South Carolina, drawing thousands of visitors from across the country to witness this rare astronomical event. Totality was visible in a band across the state, from near Greenville in the northwest to near Charleston in the southeast.