1. On September 18, 1862, the Battle of Shepherdstown took place during the Civil War. Confederate forces successfully crossed the Potomac River and fought Union troops, resulting in a Confederate victory.

2. The Chesapeake and Ohio Canal, which runs from Washington, D.C. to Cumberland, Maryland, officially opened on September 18, 1830. The canal was a major transportation route for goods and passengers until the 1920s.

3. On September 18, 1983, the Baltimore Orioles lost their final game at Memorial Stadium, their home field for 38 years. The team moved to Camden Yards the following season.

4. Maryland's first governor, Thomas Johnson, was born on September 18, 1732. He served as governor from 1777 to 1779 and was the first person appointed to the Supreme Court by President George Washington.

5. In 2009, the National Great Blacks in Wax Museum in Baltimore opened an exhibit honoring Maryland native and civil rights leader Gloria Richardson. The exhibit features a life-sized statue of Richardson and highlights her work with the Cambridge Nonviolent Action Committee in the 1960s.