Where are you from, man? You can find many documents about it in local (Cieszyn Silesia and Těšín Silesia) archives, both Czech and Polish. Statements in that "oxford" book are false, there were much more Germans here, more Poles and less Czechs. It not even mention Jews! Erik Goldstein's book (which is cited here) tells about Polish majority here, that's why the Polish Army annexed this territory, most of the people were Poles, deal with it! Also author of that "oxford-crappy-simplyfying book" tells about Zaolzie "area", so I don't know why you added it to Český Těšín article. There is nothing pro Polish in this article, "liberation" would be pro Polish, there is an "annexation" term here etc. This is perfectly npov article. Btw. I am Czech but hate that nationalist pov-pushers like you.