Bill Gates left the Microsoft board after founding the company four decades prior.
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The first major revolt of the 1848-1849 German revolutions began in Vienna.
The US army enlisted its first female colonel, Julia Flikke.
Itza, the last Mayan kingdom, was conquered by Spanish forces.
Pope Leo XII renewed the prohibition of members of the Catholic Church from joining the Freemasons.
Earmuffs were patented.
