1. On August 7, 1782, a group of Native Americans attacked the village of Gnadenhutten in eastern Pennsylvania, killing nearly 100 Christianized Delaware Indians. The attack was in retaliation for the Moravian massacre of Lenape Indians in 1755, and it served to escalate tensions between Native Americans and early settlers.

2. The Battle of Bushy Run, one of the most significant conflicts of the Pontiac War, took place on August 7, 1763, near present-day Harrison City in western Pennsylvania. British forces under the command of Colonel Henry Bouquet defeated a Native American coalition led by Chief Pontiac, securing the frontier settlements of western Pennsylvania.

3. On August 7, 1947, a B-29 bomber carrying a nuclear weapon crashed near the town of Waynesboro in southern Pennsylvania. The weapon was damaged but did not detonate, and the incident sparked concerns about the safety of nuclear weapons and their transportation.

4. The Reading Railroad Strike, one of the largest labor strikes in U.S. history, began on August 7, 1877, in Reading, Pennsylvania. The strike was sparked by wage cuts and poor working conditions for railroad workers, and it quickly spread throughout the United States, leading to violent clashes and widespread disruption of transportation and commerce.

5. On August 7, 1915, the Brookline Airfield in Pittsburgh became the first airport in the United States to offer commercial passenger service. The airport, which was later renamed the Pittsburgh International Airport, played a significant role in the development of air travel and transportation in the 20th century.