By and large , the new operations were successful . In El Salvador and Mozambique , for example , peacekeeping provided ways to achieve self-sustaining peace . Some efforts failed , perhaps as the result of an overly optimistic assessment of what UN peacekeeping could accomplish . While complex missions in Cambodia and Mozambique were ongoing , the Security Council dispatched peacekeepers to conflict zones like Somalia , where neither ceasefires nor the consent of all the parties in conflict had been secured . These operations did not have the manpower , nor were they supported by the required political will , to implement their mandates . The failures — most notably the 1994 Rwandan Genocide and the 1995 massacre in Srebrenica and Bosnia and Herzegovina — led to a period of retrenchment and self-examination in UN peacekeeping
1995 massacre
Srebrenica massacre
United Nations peacekeeping