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.
Flag of the Croatian Republic of Herzeg-Bosnia
Since the creation of Bosniak-Croat Federation of Bosnia and Herzegovina in 1994 and the establishment of its 10 cantons in 1996, as Herzeg-Bosnia was abolished, it was used as the official flag of three Croat-majority cantons (Posavina Canton, Canton 10 and West Herzegovina Canton). In 1997 and 1998 the Constitutional Court of the Federation of Bosnia and Herzegovina ruled its usage as a canton flag unconstitutional, since the symbols of cantons and municipalities cannot represent just one ethnic group. Posavina Canton changed its flag in 2000, while it is still used as an official flag of West Herzegovina Canton (since Croats comprise 98,8% of the population) and, controversially, Canton 10 (with 77% of Croats).