1. On April 10, 1777, American General William Smallwood and his men engaged in a battle with British troops in the city of Princeton, New Jersey. Smallwood had previously served as a delegate to the Continental Congress from Delaware.

2. On April 10, 1845, the Delaware General Assembly passed a law prohibiting the sale of spirits on Sundays, except for medicinal purposes. This law was later repealed in 1855.

3. In 1866, the Delaware State Institute of Science was established on April 10. The institute is dedicated to furthering scientific knowledge through research, education, and public outreach.

4. On April 10, 1876, the town of Laurel was officially incorporated in Delaware. It is now considered one of the largest towns in Sussex County.

5. In 1948, the Delaware Memorial Bridge was dedicated on April 10. The bridge spans the Delaware River and connects Delaware and New Jersey. It is one of the largest suspension bridges in the world.