1. In 1664, the Duke of York (later King James II) granted William Penn a large tract of land in what is now Delaware, leading to the establishment of the colony of Pennsylvania.

2. On May 28, 1778, during the American Revolution, British troops landed in the Delaware River near Salem, New Jersey, and attacked a group of American soldiers, killing or capturing many of them.

3. In 1831, Delaware became the first state to ban dueling, which was a popular practice among wealthy men in the 19th century.

4. On May 28, 1929, the Delaware Memorial Bridge Commission was established by the state of Delaware and the Commonwealth of Pennsylvania to oversee the construction of a bridge across the Delaware River. The bridge, which opened in 1951, spans the river between New Castle, Delaware, and Pennsville, New Jersey.

5. In 1965, Delaware Governor Charles Terry signed a law legalizing abortion in the state in cases where the mother's life was in danger or where the pregnancy resulted from rape or incest. This made Delaware the first state in the U.S. to partially legalize abortion.