Jens Pattke reported in the German vexillology mailing list about the flag of one of the Landsmannschaften (territorial or country associations) of Vertriebene (refugees from former German territories or formerly German-inhabited regions in Eastern Europe). He explained that the Silesians are a very active group. Originally there was a single group representing all the Silesians, from which the Upper Silesians separated in 1950 on the grounds of different cultural heritage.
As flag they use their traditional Landesfarben (yellow and blue) with the coat-of-arms. The Landesfarben derive from the arms. The arms of Upper Silesia were adopted after the First World War and depict a half-eagle (a reminder of the 1921 handover of part of this region to Poland) and instruments representing the main industries of the region, agriculture and mining. Santiago Dotor, 13 July 2001
This association is representing only those Silesians having lived in the eastern part of Upper Silesia, which had been ceded to Poland after WW1 due to its economic importance (mining) , although the majority in a plebiscite had voted for Germany. (editorial note)
Klaus-Michael Schneider, 15 March 2015