Complex sentence: The Dalmatae (or Greek language "Delmatoi") were an ancient bellicose people who inhabited the core of what would then become known as Dalmatia after the Roman conquest-now the eastern Adriatic coast in Croatia, between the rivers Krka and Neretva.
Split into simpler sentences: The Dalmatae (or Greek language "Delmatoi") were an ancient bellicose people who inhabited the core of what would become known as Dalmatia after the Roman conquest. Dalmatia is now the eastern Adriatic coast in Croatia, between the rivers Krka and Neretva.