The first Walmart store opened in Rogers, Arkansas.
Source
A peace agreement was signed between King John of England and Prince Louis VIII of France, marking the end of the Siege of Roche-au-Moine, France.
Inventor Thomas Savery patented the first steam engine in England.
Martin Luther was almost struck by lightning and became a monk.
Charles J. Guiteau shot US President James A. Garfield in Washington, D.C.
North and South Vietnam were formally reunified after more than twenty years of war.