This week, the International Criminal Court heard closing arguments in the trial of Dominic Ongwen, a top commander of the Lord’s Resistance Army in Northern Uganda. Among the 70 counts of war crimes and crimes against humanity he faces are 19 counts of sexual and gender-based crimes, including rape, sexual slavery, and forced marriage—the widest range of such crimes ever to be brought to trial before the court. The case thus marks a milestone in the jurisprudence of these international crimes.