Complex sentence: The Wilno Voivodship that was formed as the last of the Polish voivodships in the interbellum, was created in 1923 as a combination of the lands of the former Central Lithuania and the "Department of Wilno" created in 1920.
Split into simpler sentences: The Wilno Voivodship was formed as the last of the Polish voivodships in the interbellum. It was created in 1923 as a combination of the lands of the former Central Lithuania and the "Department of Wilno" created in 1920.