The Chinese child Emperor Pu Yi ascended the Chinese throne at the age of two.
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The Battle of Tirad Pass was fought.
The United States Environmental Protection Agency was formed in the US under Director William Ruckelshaus.
Sweden introduced a groundbreaking Freedom of Press Act, becoming the first nation to introduce freedom of speech.
The world's first self-sustaining nuclear chain reaction happened in Chicago Pile-1 at the University of Chicago. It was overseen by Enrico Fermi.
The United Kingdom became the first country to legalize the use of the Pfizer COVID-19 Vaccine.