A peace agreement brokered by the White House to stem the bloodshed in the eastern Democratic Republic of Congo was signed in Washington D.C. on Friday by officials of the two African nations.

The agreement marks a breakthrough in talks and intends to attract billions of dollars of Western investment to a region rich in cobalt, copper, lithium and other minerals.

WASHINGTON (AP) — The Democratic Republic of Congo and Rwanda on Friday signed a peace deal facilitated by the U.S. to help end the decadeslong deadly fighting in eastern Congo while helping the U.S. government and American companies gain access to critical minerals in the region.