1. On August 10, 1638, Swedish colonists established a settlement on the banks of the Christina River, which they named Fort Christina. This is now considered the first permanent European settlement in the Delaware Valley.

2. On August 10, 1792, the cornerstone was laid for the original building of Delaware's Old State House in Dover. The building served as Delaware's state capitol until 1933 and is now a museum.

3. On August 10, 1846, the Wilmington and Susquehanna Railroad, the first railroad in Delaware, officially opened for business. It connected Wilmington to nearby towns and eventually extended to Baltimore, Maryland.

4. On August 10, 1925, the first meeting of the League of Women Voters in Delaware was held at the Hotel du Pont in Wilmington. The League's goal was to promote responsible citizenship and educate women about politics and government.

5. On August 10, 1968, two Delaware soldiers were killed in action during the Vietnam War. Army Specialist Fourth Class Russell E. Armentrout Jr. of Wilmington and Marine Lance Corporal Kevin J. Hickman of New Castle both lost their lives on this day.