Bosnia (region)
Bosnia (/Босна; ) is the northern region of Bosnia and Herzegovina, encompassing roughly 81% of the country; the other eponymous region, the southern part, is Herzegovina. "Bosnia" is an informal term for the whole country.
Geography of Bosnia and Herzegovina
The country's name comes from the two regions Bosnia and Herzegovina, which have a very vaguely defined border between them. Bosnia occupies the northern areas which are roughly four fifths of the entire country, while Herzegovina occupies the rest in the southern part of the country.