1. On November 21, 1789, Delaware became the first state to ratify the U.S. Constitution, making it a pivotal moment in American history. The state played a significant role in the formation and development of the country, and the ratification signaled a unifying act that set the course for a strong, united America.

2. On November 21, 1967, the Delaware Supreme Court upheld the constitutionality of the state's new law requiring all public schools to adopt integrated school policies, which paved the way for racial desegregation. Though it faced significant opposition at the time, the court ruling was a critical step forward in the fight for civil rights.

3. In 1905, the DuPont Company established a gunpowder plant in Carney's Point, New Jersey, just across the Delaware River from Wilmington. The plant would become one of the largest powder mills in the country and employed thousands of workers over the years. On November 21, 1950, an explosion at the plant killed six workers and injured dozens more, underscoring the hazardous nature of industrial manufacturing.

4. Delaware's close proximity to the Atlantic Ocean has made the state vulnerable to natural disasters over the years. On November 21, 1934, one of the deadliest storms on record struck the state, causing widespread flooding and extensive damage to homes and infrastructure. Known as the "Long Island Express" hurricane, it remains one of the most devastating natural disasters in Delaware history.

5. Finally, on November 21, 1971, the Delaware Memorial Bridge celebrated its 20th anniversary. The bridge, which spans the Delaware River and connects Delaware and New Jersey, is a vital transportation link that sees millions of cars and trucks crossing every year. Its construction was a significant engineering feat and represented an important milestone in the development of Delaware's infrastructure.