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.
West Herzegovina Canton
The majority of the present-day West Herzegovina Canton was part of Zachlumia, the medieval South Slavic principality. In the 15th century it become part of the Duchy of Saint Sava under Stjepan Vukčić Kosača, who proclaimed himself the herzog (duke), thus giving the name for the whole region - Herzegovina.
The Ottomans conquered Herzegovina in 1483, when the territory of the West Herzegovina Canton become part of the Sanjak of Herzegovina. In 1833 the Sanjak of Herzegovina become more autonomous under Ali-paša Rizvanbegović, who became pasha of the Herzegovina Eyalet, however, after his death, Herzegovina once again become a sanjak. In 1878 the whole territory was occupied and later in 1908 annexed by the Austria-Hungary, who held it until 1918. During that time, the territory of the West Herzegovina Canton was part of the District of Mostar in the Condominium of Bosnia and Herzegovina.