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.

Main Events

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.in wikipedia

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.in wikipedia

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.in wikipedia

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.in wikipedia

29 Jul-11 Aug 1938 Battle of Lake Khasan

Border clash between Japanese troops in Manchukuo and Soviet Unionin wikipedia

1-10 Oct 1938 Occupation of the Sudetenland

Occupation of the Sudetenlandin wikipedia

1 Apr 1939 Franco declares end of Spanish Civil War

Franco declares end of Spanish Civil Warin wikipedia

11 May-16 Sep 1939 Battles of Khalkhin Gol

Border clashes between Japanese troops in Manchukuo and Soviet Union, culminating in Japanese defeat at Nomonhanin wikipedia