So ... that is the basis on which the UN try to create peacekeeping and in one epic failure peacemaking opearations, at which they consistently fails.
Lets look through them shall we to see the failures in all their glory:
Completed missions (52)AfricaDates of operation Name of Operation Location Conflict
1960–1964 United Nations Operation in the Congo (ONUC) Congo Congo Crisis FAILURE: the war continued
1988–1991 United Nations Angola Verification Mission I (UNAVEM I) Angola Angolan Civil War FAILURE: only reason it succeeded is because its goal was already achieved WITHOUT UN

(too little too late)
1989–1990 United Nations Transition Assistance Group (UNTAG) Namibia Namibian War of Independence FAILURE: only reason it succeeded is because its goal was already achieved WITHOUT UN

(too little too late)
1991–1995 United Nations Angola Verification Mission II (UNAVEM II) Angola Angolan Civil War FAILURE: only reason it succeeded is because its goal was already achieved WITHOUT UN

(too little too late)
1992–1994 United Nations Operation in Mozambique (ONUMOZ) Mozambique Mozambican Civil War FAILURE: but not a very published or big one.
1992–1993 United Nations Operation in Somalia I (UNOSOM I) Somalia Somali Civil War HUGE FAILURE: I rest my case with the pirates operating off the coast.
1993–1997 United Nations Observer Mission in Liberia (UNOMIL) Liberia First Liberian Civil War FAILURE: observe its the FIRST liberian civil war ...
1993–1994 United Nations Observer Mission Uganda-Rwanda (UNOMUR) Rwanda Rwandan Civil War FAILURE: only reason it succeeded is because its goal was already achieved WITHOUT UN

(too little too late)
1993–1996 United Nations Assistance Mission for Rwanda (UNAMIR) Rwanda Rwandan Civil War FAILURE: only reason it succeeded is because its goal was already achieved WITHOUT UN

(too little too late)
1993–1995 United Nations Operation in Somalia II (UNOSOM II) Somalia Somali Civil War FAILURE: see above under Somalia I
1994 United Nations Aouzou Strip Observer Group (UNASOG) Libya Chad Aouzou Strip dispute FAILURE: a civil war sort of underscores my point

1995–1997 United Nations Angola Verification Mission III (UNAVEM III) Angola Angolan Civil War ANOTHER FAILURE: any UN mission with a roman numeral after it is almost always a failure as they have failed to resolve the basic problem that gave arise to the need for a mission ...
1997–1999 United Nations Observer Mission in Angola (MONUA) Angola Angolan Civil War HUGE FAILURE: it waas too embarrasing to call it UNAVEM IV so they chose another name.
1998–1999 United Nations Observer Mission in Sierra Leone (UNOMSIL) Sierra Leone Sierra Leone civil war FAILURE: on the grounds that there is no peace and order yet.
1998–2000 United Nations Mission in the Central African Republic (MINURCA) Central African Republic Central African Republic mutinies HALF SUCCES/FAILURE: but as no one ever hears anything about it, then its hard to judge.
1999–2005 United Nations Mission in Sierra Leone (UNAMSIL) Sierra Leone Sierra Leone civil war FAILURE: See UNOMSIL
2000–2008 United Nations Mission in Ethiopia and Eritrea (UNMEE) Eritrea Eritrean-Ethiopian War FAILURE: they sorted it out themselves without UN.
2004–2007 United Nations Operation in Burundi (ONUB) Burundi Burundi Civil War FAILURE: they ran out of steam - and not because of the UN.
1999–2010 United Nations Organization Mission in the Democratic Republic of the Congo (MONUC) Congo Second Congo War OBVIOUS AND HUGE FAILURE: The war still rages around UN personnel...
2007–2010 United Nations Mission in the Central African Republic and Chad (MINURCAT)
Chad, Central African Republic Darfur Conflict, Civil war in Chad (2005–2010) OBVIOUS AND HUGE FAILURE: The war still rages around UN personnel...
North AmericaDates of operation Name of Operation Location Conflict Website
1965–1966 Mission of the Representative of the Secretary-General in the Dominican Republic (DOMREP) Dominican Republic Operation Power Pack FAILURE: But sort of fixed thanks to massive US intervention
1989–1992 United Nations Observer Group in Central America (ONUCA) Central America1 Nicaraguan Civil War FAILURE: Only a partial success because the parties were fed up fighting anyway AND the fall of the iron curtain had robbed them of ressources. This is a common reason for many of the alleged UN "succeses" regarding peacekeeping operations.
1991–1995 United Nations Observer Mission in El Salvador (ONUSAL) El Salvador El Salvador Civil War FAILURE: See above
1993–1996 United Nations Mission in Haiti (UNMIH) Haiti 1991 coup and military rule in Haiti FAILURE: the country is still up the creek without a paddle...
1996–1997 United Nations Support Mission in Haiti (UNSMIH) Haiti Stabilizing Haiti's new democracy FAILURE: see above ...
1997 United Nations Verification Mission in Guatemala (MINUGUA) Guatemala Guatemalan Civil War FAILURE: see above ...
1997 United Nations Transition Mission in Haiti (UNTMIH) Haiti Training of the Haitian National Police FAILURE: see above ...
1997–2000 United Nations Civilian Police Mission in Haiti (MIPONUH) Haiti Training of the Haitian National Police FAILURE: a joke. A sad joke, but a joke none the less.
2000–2001 United Nations General Assembly International Civilian Support Mission in Haiti (MICAH) Haiti Training of the Haitian National Police FAILURE: see above ...
AsiaDates of operation Name of Operation Location Conflict Website
1962–1963 United Nations Security Force in West New Guinea (UNSF) Netherlands New Guinea Transfer of sovereignty over West New Guinea Indonesia FAILURE AND AN EMBARRASMENT: the area was taken over by Indonesia ...
1965–1966 United Nations India-Pakistan Observation Mission (UNIPOM) India Indo-Pakistani War of 1965 OBVIOUS FAILURE: They are still at war

1988–1990 United Nations Good Offices Mission in Afghanistan and Pakistan (UNGOMAP) Afghanistan Soviet-Afghan War Pakistan FAILURE AND AN EMBARRASMENT: too little an much too late - and they didnt really do anything ... point of fact being the continued presence of allied troops in Afghanistan.
1991–1992 United Nations Advance Mission in Cambodia (UNAMIC) Cambodia Vietnamese Occupation of Cambodia FAILURE: And here it REALLY gets embarrasing: after having completely failed to do ANYTHING about Khmer Rouge and the killing fields because China could VETO any action (because for reasons unknown, communist China got a seat in the security council in 1971), The UN suddenly chose to monitor Vietnam who only reacted to continued attacks across the border.
1992–1993 United Nations Transitional Authority in Cambodia (UNTAC) Cambodia Vietnamese Occupation of Cambodia COMPLETE FAILURE: no real government was established, no infrastructure created, no warcriminals captured and practically NO landmines cleared.
1999 United Nations Mission in East Timor (UNAMET) East Timor1 Indonesian invasion and occupation COMPLETE FAILURE: building on a previous failure ...
1999–2002 The United Nations Transitional Administration in East Timor (UNTAET) 1 East Timor Indonesian invasion and occupation SEE ABOVE
2002–2005 United Nations Mission of Support in East Timor (UNMISET) East Timor Indonesian invasion and occupation SEE ABOVE
This is just a few ... I could continue, and sadly with the same result. UN is like the League of Nations: a toothless old fool that scare no dictator and prevents no wars ...
On a final note then let me just point out that Korea is also a failure for the simple reason that there is still a state of war between north and south, Jugoslavia was an obvious failure where NATO had to take the reigns ... something which have repeated it self.
IN fact I dare anyone to bring forward ONE SINGLE successfull UN peacekeeping mission ...
Sorry about the length of the post ...