The Democratic Republic of Congo and Rwanda have signed a peace deal facilitated by the U.S. to help end the decades-long, deadly fighting in eastern Congo.

President Trump claims credit for the outcome. The main question now is how the treaty will be implemented as fighting still rages in eastern Congo.

The official signing of the peace agreement took place earlier Friday at the State Department and was witnessed by Secretary of State Marco Rubio and Senior Adviser for Africa Massad Boulos, whom Trump has largely credited with bringing about the deal.