June 19 (UPI) -- Rwanda will sign a U.S.-Qatar-mediated peace agreement with neighboring Democratic Republic of the Congo, bringing an end to a decades-long armed conflict within days. The two sides' technical delegations initialed the pact Tuesday in Washington, pledging to "disengage and disarm," deal with non-state armed groups, establish a joint security cooperation mechanism and allow refugees and displaced people to return, the State Department said in a statement . Secretary of State