1. On March 21, 1763, the Treaty of Augusta was signed between the British government and the Creek Indian Nation. The treaty established boundaries and trade relations between the two parties and paved the way for further colonization and settlement in Georgia.

2. In 1861, Georgia Governor Joseph E. Brown signed an ordinance of secession, officially pulling Georgia out of the Union and into the Confederacy. This decision would ultimately lead to the state's devastation during the American Civil War.

3. On March 21, 1913, Georgia's first female senator, Rebecca Latimer Felton, was sworn into office for a one-day term. Although her tenure was brief, Felton's achievement marked a major milestone in the women's suffrage movement.

4. In 1965, civil rights activists set out from Selma, Alabama on a march to Montgomery, Alabama to demand equal voting rights for African Americans. On March 21, the marchers arrived in Montgomery, where they were met with a crowd of over 25,000 supporters and heard speeches from prominent leaders including Martin Luther King Jr. and Ralph Abernathy.

5. On March 21, 2006, the Georgia House of Representatives passed House Bill 23, banning same-sex marriage in the state. The controversial bill sparked widespread debate and protests, with many arguing that it represented a violation of human rights and equality.