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The Central Committee of the Mongolian People's Revolutionary Party elects Yumjaagiin Tsedenbal as General Secretary, marking the beginning of his 44-year-long tenure as de facto leader of Mongolia.
A Douglas Dakota IV operated by Derby Aviation (later renamed to British Midland International) crashes in Canigou, France, killing 34 people.
Transylvania unites with Romania, following the incorporation of Bessarabia (March 27) and Bukovina (November 28) and thus concluding the Great Union.
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