1. In 1638, Swedish settlers led by Peter Minuit landed at "The Rocks" near present-day Wilmington, Delaware, marking the first permanent European settlement in the Delaware Valley.

2. On May 26, 1787, Delaware became the first state to ratify the U.S. Constitution, earning the nickname "The First State." The anniversary of this event is now celebrated annually as "Delaware Day."

3. The Battle of Camden, one of the bloodiest battles of the American Revolutionary War, took place on May 26, 1780. Although primarily fought in South Carolina, the battle had significant repercussions for Delaware, as many of its soldiers were among the casualties.

4. On May 26, 1918, the citizens of Wilmington, Delaware held a parade to celebrate the United States' entry into World War I. The parade featured over 7,000 marchers, and drew an estimated 50,000 spectators.

5. One of Delaware's most famous landmarks, the DuPont Building in Wilmington, opened for business on May 26, 1931. The 22-story Art Deco skyscraper was originally built to serve as the headquarters of the DuPont chemical company, and is now home to a variety of businesses and office spaces.