Foreign ministers from the G-8 group of nations endorsed what they called an historic pledge to prevent sexual violence in areas of conflict.
Actress Angelina Jolie joined British Foreign Secretary William Hague to announce the group would be providing an additional $36 million in funding to prevent rape, sex crimes and ensure justice for survivors.
"Today, I believe that their voices have been heard," Jolie said along side US Secretary of State John Kerry and the other ministers.
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The Group of Eight nations include US, Britain, Russia, Germany, Japan, Canada, Italy and France.
Hague said sexual crimes are "one of the greatest and most persistent injustices" today.
"This in my mind is the slave trade of our generation," he said. "Now that we have put war-zone rape on the international agenda, it must never slip off it again and it must be given even greater prominence."