Ethnic tensions intensified, although some professors of the German University were members of the Czechoslovak government. Any agreement to use the insignia for both the universities was rejected. On 21 November 1934, the German University had to hand over the insigniae to the Czechs. The German University senate sent a delegation to Minister of Education Krčmář to protest the writ. At noon on 24 November 1934, several thousand students of the Czech University protested in front of the German university building. The Czech rector Karel Domin gave a speech urging the crowd to attack, while the outnumbered German students tried to resist. Under the threat of violence, on 25 November 1934 rector (1873–1951) handed over the insigniae. These troubles of 1934 harmed relations between the two universities and nationalities. The tide turned in 1938 when, following the Munich Agreement, German troops entered the border areas of Czechoslovakia (the so-called Sudetenland), as did Polish and Hungarian troops elsewhere. On 15 March 1939 Germans forced Czecho-Slovakia to split apart and the Czech lands were occupied by Nazis as the Protectorate of Bohemia and Moravia. Reichsprotektor Konstantin von Neurath handed the historical insigniae to the German University, which was officially renamed Deutsche Karls-Universität in Prag. On 1 September 1939 the German University was subordinated to the Reich Ministry of Education in Berlin and on 4 November 1939 it was proclaimed to be Reichsuniversität. On 28 October 1939, during a demonstration, Jan Opletal was shot. His burial on 15 November 1939 became another demonstration. On 17 November 1939 (now marked as International Students' Day) the Czech University and all other Czech institutions of higher learning were closed, remaining closed until the end of the War. Nine student leaders were executed and about 1,200 Czech students were interned in Sachsenhausen and not released until 1943. About 20 or 35 interned students died in the camp. On 8 May 1940 the Czech University was officially renamed Czech Charles University () by government regulation 188/1940 Coll. World War II marks the end of the coexistence of the two universities in Prague. thumb|Detail of the stolen insignia of Charles University. From left: Sceptre of the Faculty of Theology, the Faculty of Law, the sceptre of the Rector, the sceptre of the Faculty of Medicine and the Faculty of Philosophy. In 1945 the insignia of the university (the rector's chain, the scepters of the individual faculties, the university seal