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.
Sanjak of Herzegovina
The Sanjak of Herzegovina () was an Ottoman administrative unit established in 1470. The seat was in Foča until 1572 when it was moved to Taşlıca (Pljevlja). The sanjak was initially part of the Eyalet of Rumelia but was administrated into the Eyalet of Bosnia following its establishment in 1580.