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
Lithuania Minor of Lithuanian Province. The data from the lists of colonists, which shown their descent, was published by G. Geking, G. Schmoler, A. Skalveit in their researches. The ethnic Lithuanian inhabitants of Lithuania Minor called themselves Lietuvininkai (other form Lietuvninkai). L. Baczko wrote around the end of the 18th century: The historical sources indicate that Lietuvininkai is one of two historical ways to call all Lithuanians. Lietuvninkai ("Литовники") are mentioned in the recording (1341) of the second chronicle of Pskov. In what had been the Grand Duchy of Lithuania, the word "lietuvis" became more popular, while in Lithuania Minor "lietuvininkas" was