Complex sentence: Bulgaria subsequently regained South Dobruja as a result of the Treaty of Craiova and during World War II together with Nazi Germany, temporarily reoccupied most of the other territories ceded under the treaty.
Split into simpler sentences: Bulgaria subsequently regained South Dobruja as a result of the Treaty of Craiova. During World War II, together with Nazi Germany, it temporarily reoccupied most of the other territories ceded under the treaty.