Forces are divided into four regional commands: Regional Command "Astana" headquartered in Nur-Sultan Regional Command "East" headquartered in Semey Regional Command "West" headquartered in Atyrau Regional Command "South" headquartered in Taraz Poland Initially, right after the First World War, Poland had five military districts (1918–1921): Kraków Military District (Krakowski Okręg Wojskowy), HQ in Kraków Łódź Military District (Łódzki Okręg Wojskowy), HQ in Łódź Lublin Military District (Lubelski Okręg Wojskowy), HQ in Lublin. Poznań Military District (Poznański Okręg Wojskowy), HQ in Poznań Warsaw Military District (Warszawski Okręg Wojskowy), HQ in Warszawa. In 1921, due to reorganization, the military districts were replaced with Dowództwo Okręgu Korpusu (DOK – Corps District Command). In the Second Polish Republic there were ten DOKs: I – Warszawa II – Lublin III – Grodno IV – Łódź V – Kraków VI – Lwów VII – Poznań VIII – Toruń IX – Brześć nad Bugiem X – Przemyśl Each DOK consisted of four large units (three infantry divisions and one cavalry brigade). For district arrangements after World War II see Polish Land Forces. The Kraków Military District disbanded in 1953. From 1999 Poland has been divided into two military districts, the Pomeranian Military District and the Silesian Military District, both were disbanded by the end of 2011. Russia and the Soviet Union Russian Empire The Russian Empire's military district (, voyenny okrug) was a territorial association of military units, formations, military schools, and various local military establishments. This territorial division type was utilized in Imperial Russia, USSR and is currently in use in Russian Federation. Such territorial division provided convenient management of army units, their training and other activities regarding the country's readiness to defend itself. Soviet Union In the USSR, the military districts continued to perform the same role they had done in the Russian Empire, with first six military districts (Yaroslavsky, Moskovsky, Orlovsky, Belomorsky, Uralsky, and Privolzhsky) were formed on 31 March 1918 during the Russian Civil War. This increased to 17 military districts of the USSR at the beginning of July 1940 shortly before the USSR was invaded by Germany and entered the Second World War, and were used to create combat Fronts after commencement of the German invasion of the USSR. During the war the districts were further divided into geographic regions for logistic reasons, these being: North and North Western districts West and Central USSR districts South and South Western districts Siberian and