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.
Croatian Republic of Herzeg-Bosnia
The term "Herzeg-Bosnia" () appeared in the late 19th century and was used as a synonym for Bosnia and Herzegovina without political connotations. It was often found in folk poems as a more poetic name for Bosnia and Herzegovina. One of the earliest mentions of the term was by Croatian writer Ivan Zovko in his 1899 book "Croatianhood in the tradition and customs of Herzeg-Bosnia". Croatian historian Ferdo Šišić used the term in his 1908 book "Herzeg-Bosnia on the occasion of annexation". In the 1st half of the 20th century the name Herzeg-Bosnia was used by historians such as Hamdija Kreševljaković and Dominik Mandić and Croatian politicians Vladko Maček and Mladen Lorković. Its usage decreased in the 2nd half of the 20th century until 1991 and the proclamation of the Croatian Community of Herzeg-Bosnia. Since the 1990s it has been used as a name for a Croat territorial unit in Bosnia and Herzegovina.