King Louis I of Holland abdicated in favor of his son Napoléon Louis.
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The Cassini–Huygens spacecraft became the first to enter Saturn's orbit.
The US aired its first-ever TV commercial.
Congress banned polygamy, stating that those who are caught are to be punished.
The Battle of Somme began.
The Morse code distress signal 'SOS,' originating from Germany, became the world's official message for help.
