The Gulag Archipelago [Volume 1]: An Experiment in Literary Investigation

by Aleksandr Solzhenitsyn

And who noticed the thirty thousand Czechs who in 1939 fled from occupied Czechoslovakia to their Slavic kinfolk in the U.S.S.R.? It was impossible to guarantee that a single one of them was not a spy. They sent them all off to northern camps. (And it was out of those camps that the “Czechoslovak Corps” materialized during the war.)