A four-day summit on sexual violence in war has begun in London, hosted by UK Foreign Secretary William Hague and UN Special Envoy Angelina Jolie.
The event – the largest-ever of its kind – is the result of an intense two-year campaign to raise awareness.
Mr Hague said rape was one of the “great mass crimes” of modern times.
He has called on the 140 nations attending the summit to write action against sexual violence into their army training.
Angela Atim, one of the speakers at the conference, was kidnapped as a 14-year-old school girl by Lord’s Resistance Army (LRA) rebels in Uganda.
Nations taking part in the summit include Bosnia, the Democratic Republic of Congo and Somalia – countries where sexual violence has happened “on a vast scale”