1. In 1775, the Battle of Lexington and Concord took place on April 11, marking the start of the American Revolutionary War. Massachusetts played a crucial role in the war, as it was a major center of political and military activity.

2. In 1906, the Massachusetts Institute of Technology (MIT) was chartered on April 11. Today, MIT is one of the world's leading research universities and is known for its innovations in science and technology.

3. In 1921, the Boston Braves played their first game at Braves Field on April 11, marking the beginning of a new era for the team. The Braves were a major league baseball team that played in Boston until they moved to Milwaukee in 1953.

4. In 1970, Black Sabbath played their first show in the United States on April 11 at the Fillmore East in New York City. The British heavy metal band went on to become one of the most influential and successful bands in the genre.

5. In 2012, astronaut Sunita Williams, a native of Massachusetts, broke the record for the most spacewalking time by a woman on April 11. Williams spent a total of 50 hours and 40 minutes on spacewalks during her career with NASA.