1. In 1844, the first telegraph message in the United States was sent from the Mt. Clare Station in Baltimore to Washington D.C. The message was sent by Samuel Morse and marks a significant milestone in the history of communication.

2. On November 9, 1880, the Baltimore Orioles baseball team was established. The team went on to win three National League pennants and are remembered as one of Baltimore's greatest baseball franchises.

3. In 1938, Kristallnacht occurred, a significant event in world history. This violent attack on Jews and Jewish property in Germany marked a turning point in the persecution of Jews by the Nazi regime and is remembered as a tragic moment in human history.

4. On November 9, 1950, the Baltimore City Police Department admitted its first African American officer, Violet Hill Whyte. Whyte went on to work for the department for 23 years and played an important role in breaking down racial barriers in law enforcement.

5. In 1972, Maryland voters approved a referendum to legalize pari-mutuel betting on horse racing. This decision paved the way for the development of Maryland's horse racing industry, which continues to be an important sector of the state economy.