The land probably depopulated during the war and the source of the regeneration of the population was internal as well as presumably mainly external from neighbouring areas. The land was resettled by returning refugees and newcomers from the Grand Duchy of Lithuania. After the permanent war had ended finally with the Treaty of Melno in 1422, the population continued to grow. The newcomers were Lithuanians from Trakai, Vilnius voideships and Samogitia. Lithuanian farmers used to flee to the Sudovian forest, which lain in the Trakai voivodeship, and live here without dues, what was possible until the agrarian reform of Lithuania, performed during the second half of the 16th century.