Herzegovina
Herzegovina ( or ; Serbo-Croatian: "Hercegovina", Херцеговина, ) is the southern region of Bosnia and Herzegovina. While there is no official border distinguishing it from the Bosnian geographical region, it is sometimes asserted that the borders of the region are Dalmatia to the southwest, Montenegro to the east, Mount Maglić to the northeast, and Mount Ivan to the north. Measurements of the area range from , or around 22% of the total area of the present-day country, to , around 24% of the country.
Bosnia and Herzegovina
Bosnia is first mentioned "as a land (horion Bosona)" in Byzantine Emperor Constantine Porphyrogenitus' "De Administrando Imperio" in the mid 10th century, at the end of a chapter (Chap. 32) entitled "Of the Serbs and the country in which they now dwell". This has been scholarly interpreted in several ways and used especially by the Serb national ideologists to prove Bosnia as originally a "Serb" land. Other scholars have asserted the inclusion of Bosnia into Chapter 32 to merely be the result of Serbian Grand Duke Časlav's temporary rule over Bosnia at the time, while also pointing out Porphyrogenitus does not say anywhere explicitly that Bosnia is a "Serb land". In fact, the very translation of the critical sentence where the word "Bosona" (Bosnia) appears is subject to varying interpretation.