1. In 1733, General James Oglethorpe and the first colonists arrived in Georgia, marking the establishment of the colony. Oglethorpe was determined to create a colony that would serve as a buffer between Spanish Florida and English South Carolina, and he prohibited slavery and limited land ownership to prevent the development of an aristocracy.

2. On May 15, 1864, Union General William T. Sherman began his Atlanta Campaign during the Civil War. Sherman's objective was to seize Atlanta, a major Confederate transportation hub and industrial center. The campaign lasted four months and was marked by several significant battles, including the Battle of Kennesaw Mountain in June and the Battle of Atlanta in July.

3. In 1917, the United States declared war on Germany and entered World War I. Georgia played a significant role in the war effort, with the city of Atlanta becoming a major center for military training and the production of war materials.

4. May 15, 1956, marked the first day of the Montgomery Bus Boycott, a significant event in the Civil Rights Movement. The boycott was organized in response to the arrest of Rosa Parks, a black woman who refused to give up her seat on a Montgomery, Alabama bus to a white passenger. The boycott lasted for over a year and was a major victory for the Civil Rights Movement.

5. On May 15, 2018, Georgia Governor Nathan Deal signed controversial anti-abortion legislation known as the "heartbeat bill" into law. The law banned abortions after a fetal heartbeat can be detected, which typically occurs around six weeks into a pregnancy. The law faced legal challenges and was ultimately blocked by a federal judge.