Complex sentence: More than 100,000 workers were removed from "unsuitable" jobs and conscripted by the Ministry of Labour; by December 1941, Czechs could be called to work anywhere within the Reich.
Split into simpler sentences: More than 100,000 workers were removed from "unsuitable" jobs and conscripted by the Ministry of Labour. By December 1941, Czechs could be called to work anywhere within the Reich.