1. Juneteenth Celebrations: On June 19th, 1865, the news of the Emancipation Proclamation reached Texas, and this day became known as Juneteenth. Though Delaware was a Union state and slavery was abolished, African Americans faced continued discrimination and segregation, and Juneteenth celebrations in Delaware have been a way to recognize and honor African American history and resilience.

2. Delaware State Police Established: On June 19th, 1923, the Delaware State Police was officially established as a statewide law enforcement agency. The force initially consisted of just 26 officers, but has since grown to over 700.

3. Delaware's First Female Governor: On June 19th, 2001, Ruth Ann Minner was sworn in as the first female governor of Delaware. She served two terms, from 2001 to 2009, and focused on improving education, healthcare, and the state's economy.

4. DuPont's Nylon Invention: On June 19th, 1939, DuPont chemist Wallace Carothers succeeded in synthesizing the first nylon, a synthetic polymer fiber that would go on to revolutionize the textile industry. The invention was key to Delaware's economy, as DuPont was headquartered in Wilmington.

5. Brandywine Battlefield Dedicated: On June 19th, 2004, the Brandywine Battlefield was officially dedicated as a National Historical Landmark. The battlefield was the site of a pivotal Revolutionary War battle in 1777, and the dedication recognized its importance in American history.