1. On June 7, 1776, Delaware declared independence from Great Britain, becoming the first state to do so. The vote was unanimous among the delegates of the Delaware Assembly, who met at the New Castle Court House.

2. On June 7, 1909, the DuPont Company introduced the first successful smokeless powder, which was a safer and more efficient substitute for traditional black powder. This innovation was important for the development of modern firearms and ammunition.

3. On June 7, 1932, the boardwalk at Rehoboth Beach was officially opened. The boardwalk, which is still a popular attraction today, has undergone many changes over the years, including the addition of shops, restaurants, and amusement rides.

4. On June 7, 1952, Delaware-born Hall of Fame jockey, Eddie Arcaro, won his fifth Belmont Stakes, aboard One Count. His victory set a record that stood for over two decades as the most wins in the Belmont Stakes by a jockey.

5. On June 7, 1988, Delaware native Valerie Bertinelli, best known for her role on the television show One Day at a Time, married rock musician Eddie Van Halen. The couple had one child together and were married for more than 20 years until their divorce in 2007.