(Human Rights Watch) – Horrific levels of rape and other forms of sexual violence have plagued eastern Democratic Republic of Congo for almost two decades. Tens of thousands of women, girls, men, and boys have been raped and otherwise sexually abused. The exact number of victims is unknown. The gathering of world leaders and activists in London for the Global Summit to End Sexual Violence in Conflict on June 10-13, 2014, is an important opportunity for the Congolese government, donors, and other actors to make concrete commitments to support efforts to bring justice to the victims in eastern Congo. This document provides an overview of some of the worst cases of mass rape and other forms of sexual violence committed in recent years by the Congolese army and non-state armed groups, and the inadequate efforts to hold those responsible to account. It makes recommendations to strengthen accountability for crimes of sexual violence in Congo.