This document discusses war crimes and international humanitarian law (IHL). It defines war crimes as grave violations of IHL that individuals can be held criminally responsible for. For a crime to occur, there must be an ongoing armed conflict between states or organized armed groups. Crimes must also be sufficiently related to the armed conflict in terms of the perpetrator's role, victim status, or purpose of the act. Common war crimes include deliberately attacking civilians, using weapons that cause unnecessary suffering, and disproportionate attacks that cause excessive civilian harm compared to military advantage gained. While attacks on military targets are allowed under IHL, civilians and civilian infrastructure must be protected to the extent possible during armed conflict.