The Trans-Siberian Railroad is a network of railways connecting Moscow with the Russian Far East and the Sea of Japan. Except for the twice per month regularly served connection between Moscow and Pyongyang, it is the longest railway in the world. There are branch lines to China through Mongolia and Manchuria, with service continuing to North Korea.
The Tran-Siberian railroad was the prime target of the Japanese Army in Manchuria in 1939, when they invadedSiberia. They succeeded in taking several points of the railroad, effectively cutting off Vladivostok from supplies in the west, which allowed the city to fall.
In the ensuing peace, parts of the railroad were still in Japanese hands and none were added in order to supply the port city of Magadan.