 After the reunification of the Polish state by Władysław I in the early 14th century, Mazovia became its fief in 1351.In the second half of 15th century western Mazovia and in 1526/1529 the main part (with its capital in Warsaw) was incorporated into the Polish state.In the 15th century the eastern part of the region (Łomża) was settled, mainly by the yeomanry ("drobna szlachta").