1. On October 15, 1777, the Battle of Saratoga ended with the surrender of British General John Burgoyne to American General Horatio Gates. The victory at Saratoga proved to be a significant turning point in the Revolutionary War and helped secure French support for the American cause.

2. October 15, 1814, saw the opening of the Chesapeake and Delaware Canal. The canal connected Chesapeake Bay and Delaware Bay, providing a new trade route for shipping and creating economic opportunities for Delaware.

3. In 1879, a devastating fire destroyed much of the city of Wilmington, Delaware. The fire began on October 15 and burned for several days, destroying hundreds of buildings and causing millions of dollars in damage.

4. On October 15, 1928, the Wilmington Airport opened to the public. The airport has since been renamed Wilmington-New Castle Airport and serves as a major commercial and general aviation hub for the region.

5. In 1982, Delaware celebrated its 350th anniversary with a year-long series of events and initiatives. October 15 of that year was designated as "Founders' Day" and marked the official anniversary of the state's founding in 1632 by Dutch settlers.