1. Delaware Became a State: On December 10, 1787, Delaware officially became the first state to ratify the United States Constitution. This event was important because it helped pave the way for the creation of a stronger, more unified United States.

2. The Establishment of Wilmington College: On December 10, 1946, Wilmington College was established in Wilmington, Delaware. The institution has since grown into Wilmington University, which offers a wide range of academic programs and has a student population of over 20,000.

3. A Tribute to Caesar Rodney: On December 10, 2015, a tribute statue was unveiled in Wilmington, Delaware to recognize the contributions of Caesar Rodney, a prominent Delaware politician who played a critical role in the American Revolution. The statue is located in Rodney Square, which was named in his honor.

4. Delaware's First Congresswoman: On December 10, 1923, Clatworthy Thompson became the first woman from Delaware to be elected to the United States Congress. Although Thompson only served one term in office, her historic election paved the way for future female politicians in the state.

5. DuPont Announces Major Expansion: On December 10, 1996, DuPont announced plans to invest over $1 billion in a major expansion of its manufacturing operations in Delaware. The expansion created hundreds of new jobs for local residents and helped solidify DuPont's position as a major economic force in the state.