1. In 1781, American forces, including troops from Maryland, joined forces with French forces to defeat British troops at the Battle of Yorktown in Virginia. This pivotal victory helped to secure American independence.

2. On September 28, 1862, the Battle of Antietam took place in Sharpsburg, Maryland. It was the bloodiest one-day battle in American history, with over 23,000 casualties.

3. The Baltimore Orioles won the American League East championship on September 28, 1979. This was their first division title in over a decade and led to a World Series victory.

4. On September 28, 1994, the US House of Representatives held hearings on the dispute between the Baltimore Orioles and Washington Nationals over territorial rights. This dispute ultimately led to the creation of the Nationals as a new MLB team.

5. On September 28, 2016, Maryland native Katie Ledecky was honored with a parade in Bethesda after winning four gold medals and one silver medal at the 2016 Summer Olympics in Rio de Janeiro, Brazil.