Complex sentence: It was the first facing of Turks at Rudine, the Bosnians, although fewer, finally fought near the town of Bileća and gave them a defeat, which delayed the Ottomans' advances into Bosnia.
Split into simpler sentences: It was the first facing of Turks at Rudine. The Bosnians, although fewer, finally fought near the town of Bileća and gave them a defeat, which delayed the Ottomans' advances into Bosnia.