Temporary capital of Lithuania during the invasion of Poland, to Lithuania according to the Soviet–Lithuanian Mutual Assistance Treaty. Since then Vilnius has been the capital of the Lithuanian SSR and then independent Lithuania. Lithuania refused to have diplomatic relations between Poland and Lithuania until the ultimatum of 1938. Railroad traffic, telegraph lines or even mail could not cross the Polish–Lithuanian border. Lithuania continued to declare Vilnius as its capital in all official documents, including the constitution. Since the city was controlled by Poland, all Lithuanian authorities were transferred to the city of Kaunas, which became the seat of the government. To reconcile reality with
Regional Party of Lithuania and White Ruthenia Regional Party of Lithuania and White Ruthenia The Regional Party of Lithuania and White Ruthenia was a political party of major Polish-speaking (mostly of Belarusian origin) nobility and landlords (so called krajowcy) living on the lands of the former Grand Duchy of Lithuania (what is now Republic of Lithuania and Belarus) in early 20th century. The initiator of creation of the party was Raman Skirmunt (he called himself "Belarusian"). In November 1905 he published a manifest of the "Regional party of Lithuania and Ruthenia" that in fact was a party program which demanded introduction of democratic freedoms and especially the