1. The first recorded tornado in Maryland history struck on April 6, 1683. The powerful tornado caused widespread damage and was reported to have crossed the Chesapeake Bay.

2. In 1813, the British Navy launched a surprise attack on the town of Havre de Grace, Maryland on April 6 during the War of 1812. The town was burned and looted, but the attack ultimately failed to halt American forces.

3. On April 6, 1861, following the outbreak of the Civil War, pro-Confederate mobs attacked the offices and printing presses of the Baltimore Sun and other pro-Union newspapers in Baltimore. The violence led to the deployment of federal troops to the city and helped solidify Maryland's support for the Union cause.

4. The University of Maryland played its first intercollegiate football game on April 6, 1892, against the Baltimore Athletic Club. The Terrapins won the game 16-0 and went on to become one of the most successful college football programs in the country.

5. On April 6, 1959, the Johns Hopkins University Applied Physics Laboratory successfully launched the first Jupiter-C rocket, which carried the United States' first satellite, Explorer 1, into orbit. The mission marked a major milestone in the Cold War space race and paved the way for future space exploration.