Temporary capital of Lithuania constitutional claims, Kaunas was designated as a temporary or provisional capital until Vilnius would be "liberated from Polish occupation". In March 1938, Lithuania accepted a Polish ultimatum, demanding diplomatic relations. Despite normalised relations, the new Lithuanian Constitution, in May 1938, still claimed Vilnius as the "de jure" capital of Lithuania, and Kaunas remained as the temporary capital. Temporary capital of Lithuania The temporary capital of Lithuania () was the official designation of the city of Kaunas in Lithuania during the interwar period. It was in contrast to the declared capital in Vilnius, which was under Polish control from 1920 until
History of Lithuania 1410, but the allied armies failed to take Marienburg, the Knights' fortress-capital. Nevertheless, the unprecedented total battlefield victory against the Knights permanently removed the threat that they had posed to Lithuania's existence for centuries. The Peace of Thorn (1411) allowed Lithuania to recover Samogotia, but only until the deaths of Jogaila and Vytautas, and the Knights had to pay a large monetary reparation. The Union of Horodło (1413) incorporated Lithuania into Poland again, but only as a formality. In practical terms, Lithuania became an equal partner with Poland, because each country was obliged to choose its future ruler only with