Adolf Hitler formed the Schutzstaffel, the infamous paramilitary organization known to most as the SS.
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Martin Luther King Jr. was assassinated.
The Declaration of Breda document was issued by the exiled King Charles II of England.
Moscow was mentioned for the very first time in historical records when two princes met there for a great banquet.
Finland officially joined NATO, becoming the 31st member of the security alliance.
US Congress released a US flag that featured 20 stars and 13 red and white stripes.
