1. On September 27, 1776, American forces under General George Washington defeated British troops at the Battle of White Plains in New York, a significant victory in the American Revolution. Many Maryland soldiers fought in this battle, including the famous "Maryland 400" who held off British forces while the rest of Washington’s army retreated to safety.

2. On September 27, 1825, the Marquis de Lafayette, a hero of the American Revolution, visited Baltimore as part of his tour of the United States. He was welcomed with a grand parade and fireworks display, and visited several sites of historical significance in the city.

3. In 1903, on September 27, the first World Series of Major League Baseball was played between the Pittsburgh Pirates and the Boston Americans. Although no Maryland teams participated in this inaugural series, the state has a rich baseball history, with several minor and major league teams representing various cities throughout the years.

4. On September 27, 1964, the Chesapeake Bay Bridge was officially opened, connecting Maryland’s eastern and western shores over the Chesapeake Bay. At the time, it was the longest continuous over-water bridge in the world, and it remains an iconic symbol of Maryland’s transportation infrastructure today.

5. Finally, on September 27, 2013, the Baltimore Ravens faced off against the Buffalo Bills in a regular season NFL game in Orchard Park, New York. Although the game itself was not particularly memorable, it marked the return of Ravens’ linebacker and future Hall of Famer Ray Lewis, who came out of retirement to play in the 2013 season.