During World War I, Lesser Poland became one of main theaters of the Eastern Front. Russian push into the territory of Austria – Hungary resulted in the Battle of Galicia. Among other major battles which took place in Lesser Poland, there are the Battle of the Vistula River, and the Gorlice-Tarnów Offensive. After Russian troops had retreated east, whole province was under control of the Austrians and the Germans, and northern Lesser Poland was part of the German-sponsored Kingdom of Poland (1916–1918). In later stages of the conflict, the divided province once again became a center of Polish independence movement. An independent Polish government was re-proclaimed in northern Lesser Poland's city of Lublin, on 7 November 1918. Soon afterwards, it formed the basis of the new government of the country. In other parts of the province, other governments were formed – Polish Liquidation Commission in Kraków, also the short-lived Republic of Tarnobrzeg.