Astronomer William Herschel first observed Uranus.
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The US army enlisted its first female colonel, Julia Flikke.
Bill Gates left the Microsoft board after founding the company four decades prior.
Marvel's 'Captain America: The Winter Soldier' premiered in Los Angeles.
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.