1. Maryland ratified the U.S. Constitution on December 6, 1787, becoming the seventh state to do so. This paved the way for Maryland to become one of the original 13 states of the United States of America.

2. On December 6, 1865, Maryland became the second state to ratify the 13th Amendment to the Constitution, which abolished slavery and involuntary servitude in the United States.

3. December 6, 1957 marked the opening of the Chesapeake Bay Bridge, which spans 4.3 miles and connects Maryland's eastern and western shores. It is one of the largest suspension bridges in the world and has become an iconic symbol of the state.

4. In 1974, the U.S. Naval Academy in Annapolis, Maryland opened its doors to female midshipmen for the first time. December 6 marks the anniversary of this historic event, which paved the way for gender equality in the military.

5. On December 6, 2002, John Allen Muhammad, known as the "D.C. Sniper," was found guilty of capital murder in Maryland for the shooting spree he carried out in the Washington, D.C. area in 2002. Muhammad and his accomplice, Lee Boyd Malvo, terrorized the region for three weeks, killing 10 people and injuring several others. Muhammad was ultimately executed for his crimes in 2009.