North and South Vietnam were formally reunified after more than twenty years of war.
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The Civil Rights Act of 1964 was signed into law by US President Lyndon B. Johnson.
Charles J. Guiteau shot US President James A. Garfield in Washington, D.C.
The first Earl of Shaftesbury, Anthony Ashley Cooper, was arrested for high treason in England.
Inventor Thomas Savery patented the first steam engine in England.
The International Astronomical Union named Pluto's fourth and fifth moons Kerberos and Styx.