https://history.ru/read/articles/v-etu-noch-rieshili-samurai-istoriia-konflikta-na-khalkhin-golie
August 20 – the beginning of the decisive Soviet-Mongolian offensive at Khalkhin Gol in 1939 – a memorable date in Russia’s military history.By the summer of 1939, fierce fighting had been raging for months near the Khalkhin Gol River in Mongolia, where Japanese forces had crossed into Mongolian territory. On August 20