Hamas attacked Israel in October 2023, firing missiles and taking hostages, which killed over 1,400 Israelis. In response, Israel launched Operation Iron Sword, extensively bombing Gaza and imposing a blockade. This caused over 4,385 Palestinian deaths, including many civilians. Both sides failed to distinguish civilians from combatants. Their actions likely constituted war crimes and crimes against humanity under the Rome Statute. International humanitarian law seeks to minimize civilian suffering during armed conflicts by requiring distinction and proportionality and facilitating humanitarian aid. Third states have obligations under treaties to prevent international crimes and protect civilians. De-escalation is crucial to prevent the conflict from worsening.