Complex sentence: Stavrinos pg.539 Perceiving an opportunity to acquire Southern Dobrudja Romania also invaded Bulgaria, meeting virtually no resistance and was soon followed by the Ottoman Empire which restored its control over Eastern Thrace.
Split into simpler sentences: Stavrinos pg.539 Perceiving an opportunity to acquire Southern Dobrudja, Romania also invaded Bulgaria. The Romanian forced met with almost no resistance and was soon followed by the Ottoman Empire, which restored its control over Eastern Thrace.