The term 'Serbs or Bosnians' refers to the Slavic ethnic group that inhabits the Balkan region of southeastern Europe. They are primarily concentrated in Serbia, Bosnia and Herzegovina, Montenegro, Croatia, and Macedonia. The Slavs are an Indo-European ethnic group that have a long history in the region, with their language being one of the oldest in Europe. They are known for their rich culture, which includes music, literature, and art.