The International Criminal Court will likely not prosecute anyone over the war in Iran and would struggle to even if it did

Individuals are usually prosecuted for such crimes — also genocide and aggression — by the International Criminal Court (ICC), but there is a major issue here: the ICC doesn’t have jurisdiction over the US, Israel and Iran. This is due to the court only having the power to adjudicate over the 125 countries which signed the Rome Statute, a 1998 treaty which established the ICC.