Northern Eurasia 1939: Soviet-Japanese Border Wars
The late 1930s saw international stability further deteriorate, with a Japanese invasion of China followed by the German seizure of Austria and Czechoslovakia. Japan's expansionism brought it into direct conflict with the Soviet Union. In July and August 1938, and again from May to September 1939, the Japanese were beaten back in undeclared border wars with Soviet and Mongolian troops.
5 Dec 1936 Dissolution of Transcaucasian SFSR▲
With the adoption of the 1936 Soviet Constitution, the Transcaucasian Socialist Federative Soviet Republic is dissolved and succeeded by the Armenian, Azerbaidzhan, and Georgian Soviet Socialist Republics.
5 Dec 1936 Kazakh Soviet Socialist Republic▲
Upon the adoption of the 1936 Soviet Constitution, the Kazakh Autonomous Soviet Socialist Republic within the Russian RSFSR becomes the Kazakh Soviet Socialist Republic, a separate constituent republic of the Union of Soviet Socialist Republics.
5 Dec 1936 Kirghiz Soviet Socialist Republic▲
With the adoption of the 1936 Soviet Constitution, the Kara-Kirghiz Autonomous Oblast of the Russian SFSR becomes the Kirghiz Soviet Socialist Republic, a separate constituent republic of the Union of Soviet Socialist Republics.
7 Jul 1937 Japanese invasion of China▲
On the night of July 7, Chinese and Japanese troops exchanged fire in the vicinity of the Marco Polo bridge, an important access route to Beiping (Beijing). The confused skirmish escalated into a full-scale battle in which Beiping and Tianjin fell to Japanese forces, and marked the outbreak of the Second Sino-Japanese War.
29 Jul–11 Aug 1938 Battle of Lake Khasan▲
Border clash between Japanese troops in Manchukuo and Soviet Union
1–10 Oct 1938 Occupation of the Sudetenland▲
Occupation of the Sudetenland
1 Apr 1939 Franco declares end of Spanish Civil War▲
Franco declares end of Spanish Civil War
11 May–16 Sep 1939 Battles of Khalkhin Gol▲
Border clashes between Japanese troops in Manchukuo and Soviet Union, culminating in Japanese defeat at Nomonhan