George Washington created the Purple Heart medal that symbolizes military merit.
Source
The first British troops arrived in France during World War I.
NASA's Explorer 6 satellite launched from Cape Canaveral, Florida.
The Valais Witch Trials started in Switzerland, making it the first witch hunt of its kind, which became much more widespread over the next few decades.
Lynne Cox set a new record by swimming 2.7 miles (4.3 km) from Alaska to Siberia in a swimsuit.
The Eden train wreck happened when a trail derailed from Denver, Colorado, to St Louis, Missouri.
