1. On March 3, 1638, Swedish settlers established the first permanent European settlement in Delaware, naming it Fort Christina after the queen of Sweden.

2. In 1781, during the American Revolutionary War, the Battle of Hobkirk's Hill was fought in South Carolina with Delaware troops playing a significant part in the Continental Army's successful defense.

3. On March 3, 1829, the Delaware General Assembly approved the construction of the Chesapeake and Delaware Canal, providing a faster and more efficient water route for ships traveling along the East Coast.

4. In 1875, Delaware's first railroad, the Junction and Breakwater Railroad, was incorporated on March 3, aiming to connect Delaware's beaches to the northern cities.

5. Delaware celebrated its 50th anniversary of achieving statehood on March 3, 1897, with ceremonies and special events held throughout the state. The day was declared a state holiday, and schools and businesses closed during the celebrations.