Original sentence: Following the Royal Yugoslav Government on its way to exile during the Invasion of Yugoslavia in April 1941, he died in a plane crash on 12 April 1941 somewhere in Greece.His book on diplomatic and political history, regarding relations between Serbia and Austria-Hungary in the early twentieth century, was prevented from being distributed in 1936, after the ambassador of Nazi Germany intervened at the Yugoslav Foreign Ministry, labeling Ćorović detailed scholarly work (based on published diplomatic correspondence and unpublished sources in various languages) as alleged anti-German propaganda
Edited sentence: Following the Royal Yugoslav Government on its way to exile he was killed in a plane crash on 12 April 1941 somewhere in Greece.For his open anti-Nazi activities prior to the World War II, Vladimir Čorović was forced to leave the country in order to evade being incarcerated or sent to a concentration camp.His book on diplomatic and political history, regarding relations between Serbia and Austria-Hungary in the early twentieth century, was prevented from being distributed in 1936, after the ambassador of Nazi Germany intervened at the Yugoslav Foreign Ministry, labelling Ćorović detailed scholarly work (based on published diplomatic correspondence and unpublished sources in various languages) as alleged anti-German propaganda