1. In 1775, the Second Provincial Congress of South Carolina met on May 10th in Charleston to discuss the growing tensions with Britain and to prepare for the impending war. This congress is credited with helping to establish the state's reputation for revolutionary fervor.

2. On May 10th, 1865, Union Major General Quincy Gillmore arrived in Charleston to officially take possession of the city following the end of the Civil War. This event marked the true end of the Confederacy and the beginning of a new era in South Carolina's history.

3. In 1954, the Supreme Court issued its landmark Brown v. Board of Education decision, which declared racial segregation in public schools unconstitutional. South Carolina was one of a handful of southern states that resisted implementing the decision, leading to a protracted struggle for desegregation that lasted well into the 1970s.

4. On May 10th, 1869, the final spike was driven into the transcontinental railroad at Promontory Summit in Utah, linking the east and west coasts of the United States. Although this event did not take place in South Carolina, it marked a significant milestone in the country's history and opened up new opportunities for trade and travel.

5. Finally, May 10th is celebrated each year as Confederate Memorial Day in South Carolina, a holiday that honors the soldiers who fought for the Confederacy during the Civil War. While some view this holiday as a tribute to Southern heritage and tradition, others see it as a painful reminder of the state's racial history and the continued legacy of discrimination and inequality.