The Japanese Prime Minister, Hara Takashi, was assassinated in Tokyo.
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The Paris Climate Change Agreement went into force.
Mozart's Symphony No.36 premiered in Linz, Austria.
The first wagon train arrived in California after having left Independence, Missouri, in May 1841.
Around 1,000 Soviet tanks entered Budapest, the capital of Hungary, after bombing half the city in an attempt to take over.
Barack Obama became the first African American to win a United States Presidential Election.
