The foreign ministers for Rwanda and the Democratic Republic of the Congo signed a U.S.-brokered peace deal to end the bloodiest conflict of the 21st century.

The peace agreement, signed on Friday by Rwandan Foreign Minister Olivier Nduhungirehe and Congolese Foreign Minister Thérèse Kayikwamba Wagner, is intended to end fighting between Kinshasa and the Rwandan-backed insurgency in the eastern DRC, led by the rebel group M23. Kinshasa, Kigali, and Washington all hope the agreement will go beyond that, permanently ending hostilities that have claimed over 6 million lives since 1997.