King Louis I of Holland abdicated in favor of his son Napoléon Louis.
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The United States Postal Service introduced ZIP codes for US mail.
The Morse code distress signal 'SOS,' originating from Germany, became the world's official message for help.
The US aired its first-ever TV commercial.
Congress banned polygamy, stating that those who are caught are to be punished.
The first US postage stamps were issued.
