1. On November 20, 1789, the state of Delaware became the first state to ratify the United States Constitution, marking a pivotal moment in the early establishment of the federal government.

2. In 1834, the first steam-powered locomotive to operate on a commercial railway in the United States, the American, made its inaugural run in Delaware. The train ran from New Castle to Frenchtown, Maryland.

3. On November 20, 1864, during the American Civil War, Union forces under General William T. Sherman captured the city of Milledgeville, Georgia. Among the soldiers who participated in the capture were members of the Delaware 4th Infantry Regiment.

4. One of Delaware's most prominent political figures, Pierre Samuel du Pont de Nemours, was born on November 20, 1739 in Paris, France. Du Pont de Nemours was a key figure in the French Revolution and later emigrated to the United States, founding the DuPont chemical company in Delaware.

5. On November 20, 1985, the wreck of the British warship HMS DeBraak was discovered off the coast of Delaware by a team of underwater archaeologists. The ship sank in 1798 during a violent storm and had been lost for over 185 years. The discovery of the DeBraak has provided valuable insights into the maritime history of the region.