1. On November 3, 1837, the State of Delaware adopted its first state constitution. This constitution established the state government and created a framework for elections, the judiciary, and the General Assembly. It replaced the colonial-era Constitution of 1776 and was the first to allow free African American men to vote.

2. In 1857, on November 3, Delaware became the last of the slave states to repeal its black codes. These codes maintained many of the restrictions that had existed under slavery, such as prohibitions on education, voting, and mobility, and subjected African Americans to harsh penalties for minor offenses.

3. On November 3, 1924, Delaware voters ratified the Nineteenth Amendment to the United States Constitution, which guaranteed women the right to vote. Delaware had been slow to pass suffrage legislation in the early 20th century, and even after ratification, women faced many obstacles to exercising their new rights.

4. In 1948, on November 3, Delaware Governor Walter W. Bacon became the first sitting governor to endorse the presidential campaign of Harry S. Truman. Truman's surprise victory in the presidential election that year was due in part to his support among Southern Democrats like Bacon, who broke with the party's segregationist wing to support the president.

5. On November 3, 1987, a gas leak at the DuPont Company's Edge Moor plant in Wilmington killed four workers and injured several others. The incident highlighted the dangers of industrial accidents and spurred efforts to improve workplace safety and emergency preparedness in the state.