Complex sentence: The ICTY set the precedent that rape in warfare is a form of torture, and in 2011 indicted 161 people, from all ethnic backgrounds, for war crimes, and heard evidence from over 4,000 witnesses.
Split into simpler sentences: The ICTY set the precedent that rape in warfare is a form of torture. By 2011, it had indicted 161 people from all ethnic backgrounds for war crimes, and heard evidence from over 4,000 witnesses.