Complex sentence: In May 1940, Nazi Germany invaded Belgium as World War II broke out across Europe, and although Hergé briefly fled to France and considered a self-imposed exile, he ultimately decided to return to his occupied homeland.
Split into simpler sentences: In May 1940, Nazi Germany invaded Belgium as World War II broke out across Europe. Although Hergé briefly fled to France and considered a self-imposed exile, he ultimately decided to return to his occupied homeland.