This is a complex issue of international law and history. The determination of the territorial sovereignty of modern countries is usually based on a variety of factors, not just the ancient territory. According to the principles of modern international law, territorial sovereignty is mainly based on factors such as effective rule, international treaties, and international recognition, but not entirely on the historical territorial scope. Although historically ruled areas may be used as an argument for territorial sovereignty claims, modern international relations place more emphasis on: 1. Realistic and effective control 2. International treaties and agreements 3. General recognition by the international community 4. Principle of national self-determination Therefore, it is inaccurate to simply say that the ancient territory directly determines the sovereignty of modern territory. Territorial issues usually need to be resolved peacefully through diplomatic consultations, international treaties or rulings of the International Court of Justice.