1. On January 18, 1786, the Maryland State House in Annapolis became the nation's first peacetime capitol building in the United States following the end of the Revolutionary War. The building is still in use today as the oldest state capitol in continuous legislative use in America.

2. In 1790, the Maryland General Assembly held a meeting to officially ratify the U.S. Constitution, making Maryland the seventh state to join the union. This meeting took place in the same State House building that became the first peacetime capitol in 1786.

3. January 18, 1977, marked the beginning of Maryland's last statewide bus strike that lasted for nearly a month. The strike resulted in many Baltimore residents walking to work, and the state government had to provide alternative transportation for its employees.

4. In 2017, the Baltimore Ravens officially announced the hiring of Greg Roman as the team's new offensive coordinator on January 18. Roman helped lead the Ravens to the playoffs in his first year with the team and was instrumental in developing quarterback Lamar Jackson's game.

5. On January 18, 1944, the USS Wahoo submarine sank the Japanese cargo ship Eifuku Maru in the Pacific Ocean during World War II. The Wahoo became known as one of the most successful U.S. submarines of the war, sinking 19 Japanese ships and marking a significant victory for American forces.