Upper Silesia (Górny Śląsk; Silesian: Gůrny Ślůnsk; Horní Slezsko; Oberschlesien; Silesian German: Oberschläsing; Silesia Superior) is the southeastern part of the historical and geographical region of Silesia. Since the 9th century, Upper Silesia has been part of (chronologically) Greater Moravia, the Duchy of Bohemia, the Piast Kingdom o...
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http://en.wikipedia.org/wiki/Upper_Silesia
(from the article `Opolskie`) ...the 1100s it was the scene of wars with Bohemians who laid claim to the area. In 1173 Silesia was divided into the duchy of Wrocaw (Lower Silesia) ... ...but he was flexible on the issue of the borders of those states. The latter postulated a centralized Polish state, with its eastern border ... [2 re...
Found on
http://www.britannica.com/eb/a-z/u/15
a highly industrialized region divided between Germany and Poland after World War I.
Found on
https://www.infoplease.com/dictionary/upper-silesia
No exact match found.
