1. In 1777, the Battle of Cooch's Bridge took place in Delaware during the American Revolutionary War. This battle marked the first time that the Continental Army fought in the state and resulted in a British victory.

2. In 1865, Delaware ratified the Thirteenth Amendment to the United States Constitution, abolishing slavery and involuntary servitude in the country.

3. In 1929, the DuPont Company's Experimental Station in Delaware discovered neoprene, a synthetic rubber that has a wide range of industrial and consumer applications.

4. In 1958, Delaware became the first state to legalize the sale of contraceptives to married couples, following a Supreme Court decision that struck down a Massachusetts law banning birth control.

5. In 2011, a powerful tornado outbreak swept through the eastern United States, including parts of Delaware. The storm caused widespread damage and resulted in several fatalities and injuries in the state.