Throughout history, rape and other forms of sexual violence have been common in wartime. But it turns out that some of our understanding of why and how it happens is deeply flawed. In a lecture based on her book, Rape During Civil War, Dara Kay Cohen uncovers some of these flaws and offers a new perspective on the issue. Her research in Sierra Leone, Timor-Leste and El Salvador points to the ways in which group dynamics within some combatant groups, facilitate wartime rape.