Kronstadt is the naval headquarters in the Baltic, Sevastopol in the Black Sea and Vladivostok on the Pacific.
The second-class fortresses are Kronstadt and Sveaborg in the Gulf of Finland, Ivangorod in Poland, Libau on the Baltic Sea, Kerch on the Black Sea and Vladivostok on the Pacific. In the third class are Viborg in Finland, Ossovets and Ust Dvinsk (or Dunamunde) in Lithuania, Sevastopol and Ochakov on the Black Sea, and Kars and Batum in Caucasia.
At the Pacific end of the Siberian railway a line connecting Vladivostok with Khabarovsk (479 m.) at the junction of the Amur and the Usuri, was first of all built, following the valley of the Usuri.
Consequently a company was formed by the Russian government in 1896 to construct, with the consent of the Chinese government, a railway from Vladivostok across Manchuria to Karymskaya near Chita in Transbaikalia.
By rail east of St Petersburg) to Vladivostok, a distance of 4073 m., with a branch from Kharbin about Soo m.