WThe 1929 Kopet Dag earthquake took place at 15:37 UTC on 1 May with a moment magnitude of 7.2 and a maximum Mercalli intensity of IX (Violent). It occurred in the Kopet Dag area of Iran and caused up to 3,800 casualties along the Turkmenistan-Iran border. More than 1,100 were injured.
WThe 1929 Tuvan coup d'état took place in the Tuvan People's Republic. It occurred in January after the Tuvan government under Prime Minister Donduk Kuular attempted to implement nationalist, religious and anti-Soviet policies, including making Tibetan Buddhism the official religion. With support from the Soviet Union, five Tuvan youths successfully overthrew the government, and one of them, Salchak Toka, became supreme ruler as General Secretary of the Central Committee of the Tuvan People's Revolutionary Party. They quickly reversed Donduk's policies and brought the republic closer to the Soviet Union. The Tuvan People's Republic later joined the Soviet Union in 1944.
WThe 1929 USSR Chess Championship was the 6th edition of USSR Chess Championship. Held from 2 to 20 September in Odessa. The tournament was won by Boris Verlinsky. The event was held outside Moscow and Leningrad for the first time. 36 players competed in four quarterfinal sections, with the top three in each advancing into two six-player semifinals. The top two from each semifinals were then to play a double round final to determine the champion.
WThe Case of the Union of Liberation of Belarus was a political and criminal case initiated by the GPU of the Byelorussian Soviet Socialist Republic against several Belarusian scientists and culture activists. The case formed part of a wave of Soviet repressions in Belarus in 1929 - 1931. The GPU accused the victims of membership in a anti-Soviet organization called the Union of Liberation of Belarus. Most of the accused were killed, or expelled to far-away regions of the USSR.
WThe Litvinov Protocol is the common name of an international peace treaty concluded in Moscow on February 9, 1929. Named after the chief Soviet diplomat moving the negotiations forward, Maxim Litvinov, the treaty provided for immediate implementation of the Kellogg-Briand Pact by its signatories, thereby formally renouncing war as a part of national foreign policy.
WThe Red Army intervention in Afghanistan in 1929 was a special operation aimed at supporting the ousted king of Afghanistan, Amanullah Khan, against the Saqqawists and Basmachi.
WThe Sino-Soviet conflict of 1929 was an armed conflict between the Union of Soviet Socialist Republics and Chinese warlord Zhang Xueliang of the Republic of China over the Chinese Eastern Railway.