Basic knowledge of controversies includes the knowledge that students must possess according to the curricula. It covers the central themes of the upper secondary level and the higher grades of lower secondary education. It aids in solving tasks related to representation, interpretation, and discussion. The discussion section presents scientific interpretation controversies, based on which students can form their own opinions. The outcome of World War II continues to shape German history to this day. The first occupation period from 1945 to 1949, the division between 1949 and 1990, and the period of reunified Germany from 1990 onward are its milestones. The author presents the era since 1945 based on the latest research and enables students to discuss the scientific controversies.