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.
Herzegovina
In the modern Bosnian-Herzegovinian state, Herzegovina is divided between two entities, Republika Srpska and the Federation of Bosnia and Herzegovina. Republika Srpska's part of Herzegovina, commonly referred to as East Herzegovina or, as of late, "Trebinje Region", is administratively divided into municipalities of Trebinje, Bileća, Gacko, Nevesinje, Ljubinje, Berkovići, Istočni Mostar and Foča.