sentences:  Lithuania's independence was recognized by the Soviet Union on September 6, 1991.There were also several local issues, including the Raseiniai local issue (1919), Telšiai Postmaster's provisional issue (1920), Grodno issue (1919), and others.In the course of the Polish–Soviet War, pro-Polish separatists proclaimed the creation of the Republic of Central Lithuania (Litwa Środkowa) centered around Vilnius in October 1920.